2 * libata-core.c - helper library for ATA
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2003-2004 Red Hat, Inc. All rights reserved.
9 * Copyright 2003-2004 Jeff Garzik
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
27 * libata documentation is available via 'make {ps|pdf}docs',
28 * as Documentation/DocBook/libata.*
30 * Hardware documentation available from http://www.t13.org/ and
31 * http://www.sata-io.org/
33 * Standards documents from:
34 * http://www.t13.org (ATA standards, PCI DMA IDE spec)
35 * http://www.t10.org (SCSI MMC - for ATAPI MMC)
36 * http://www.sata-io.org (SATA)
37 * http://www.compactflash.org (CF)
38 * http://www.qic.org (QIC157 - Tape and DSC)
39 * http://www.ce-ata.org (CE-ATA: not supported)
43 #include <linux/kernel.h>
44 #include <linux/module.h>
45 #include <linux/pci.h>
46 #include <linux/init.h>
47 #include <linux/list.h>
49 #include <linux/spinlock.h>
50 #include <linux/blkdev.h>
51 #include <linux/delay.h>
52 #include <linux/timer.h>
53 #include <linux/interrupt.h>
54 #include <linux/completion.h>
55 #include <linux/suspend.h>
56 #include <linux/workqueue.h>
57 #include <linux/scatterlist.h>
59 #include <linux/async.h>
60 #include <scsi/scsi.h>
61 #include <scsi/scsi_cmnd.h>
62 #include <scsi/scsi_host.h>
63 #include <linux/libata.h>
64 #include <asm/byteorder.h>
65 #include <linux/cdrom.h>
70 /* debounce timing parameters in msecs { interval, duration, timeout } */
71 const unsigned long sata_deb_timing_normal[] = { 5, 100, 2000 };
72 const unsigned long sata_deb_timing_hotplug[] = { 25, 500, 2000 };
73 const unsigned long sata_deb_timing_long[] = { 100, 2000, 5000 };
75 const struct ata_port_operations ata_base_port_ops = {
76 .prereset = ata_std_prereset,
77 .postreset = ata_std_postreset,
78 .error_handler = ata_std_error_handler,
81 const struct ata_port_operations sata_port_ops = {
82 .inherits = &ata_base_port_ops,
84 .qc_defer = ata_std_qc_defer,
85 .hardreset = sata_std_hardreset,
88 static unsigned int ata_dev_init_params(struct ata_device *dev,
89 u16 heads, u16 sectors);
90 static unsigned int ata_dev_set_xfermode(struct ata_device *dev);
91 static unsigned int ata_dev_set_feature(struct ata_device *dev,
92 u8 enable, u8 feature);
93 static void ata_dev_xfermask(struct ata_device *dev);
94 static unsigned long ata_dev_blacklisted(const struct ata_device *dev);
96 unsigned int ata_print_id = 1;
97 static struct workqueue_struct *ata_wq;
99 struct workqueue_struct *ata_aux_wq;
101 struct ata_force_param {
105 unsigned long xfer_mask;
106 unsigned int horkage_on;
107 unsigned int horkage_off;
111 struct ata_force_ent {
114 struct ata_force_param param;
117 static struct ata_force_ent *ata_force_tbl;
118 static int ata_force_tbl_size;
120 static char ata_force_param_buf[PAGE_SIZE] __initdata;
121 /* param_buf is thrown away after initialization, disallow read */
122 module_param_string(force, ata_force_param_buf, sizeof(ata_force_param_buf), 0);
123 MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link speed and transfer mode (see Documentation/kernel-parameters.txt for details)");
125 static int atapi_enabled = 1;
126 module_param(atapi_enabled, int, 0444);
127 MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
129 static int atapi_dmadir = 0;
130 module_param(atapi_dmadir, int, 0444);
131 MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
133 int atapi_passthru16 = 1;
134 module_param(atapi_passthru16, int, 0444);
135 MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
138 module_param_named(fua, libata_fua, int, 0444);
139 MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
141 static int ata_ignore_hpa;
142 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
143 MODULE_PARM_DESC(ignore_hpa, "Ignore HPA limit (0=keep BIOS limits, 1=ignore limits, using full disk)");
145 static int libata_dma_mask = ATA_DMA_MASK_ATA|ATA_DMA_MASK_ATAPI|ATA_DMA_MASK_CFA;
146 module_param_named(dma, libata_dma_mask, int, 0444);
147 MODULE_PARM_DESC(dma, "DMA enable/disable (0x1==ATA, 0x2==ATAPI, 0x4==CF)");
149 static int ata_probe_timeout;
150 module_param(ata_probe_timeout, int, 0444);
151 MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
153 int libata_noacpi = 0;
154 module_param_named(noacpi, libata_noacpi, int, 0444);
155 MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set");
157 int libata_allow_tpm = 0;
158 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
159 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands");
161 MODULE_AUTHOR("Jeff Garzik");
162 MODULE_DESCRIPTION("Library module for ATA devices");
163 MODULE_LICENSE("GPL");
164 MODULE_VERSION(DRV_VERSION);
167 static bool ata_sstatus_online(u32 sstatus)
169 return (sstatus & 0xf) == 0x3;
173 * ata_link_next - link iteration helper
174 * @link: the previous link, NULL to start
175 * @ap: ATA port containing links to iterate
176 * @mode: iteration mode, one of ATA_LITER_*
179 * Host lock or EH context.
182 * Pointer to the next link.
184 struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
185 enum ata_link_iter_mode mode)
187 BUG_ON(mode != ATA_LITER_EDGE &&
188 mode != ATA_LITER_PMP_FIRST && mode != ATA_LITER_HOST_FIRST);
190 /* NULL link indicates start of iteration */
194 case ATA_LITER_PMP_FIRST:
195 if (sata_pmp_attached(ap))
198 case ATA_LITER_HOST_FIRST:
202 /* we just iterated over the host link, what's next? */
203 if (link == &ap->link)
205 case ATA_LITER_HOST_FIRST:
206 if (sata_pmp_attached(ap))
209 case ATA_LITER_PMP_FIRST:
210 if (unlikely(ap->slave_link))
211 return ap->slave_link;
217 /* slave_link excludes PMP */
218 if (unlikely(link == ap->slave_link))
221 /* we were over a PMP link */
222 if (++link < ap->pmp_link + ap->nr_pmp_links)
225 if (mode == ATA_LITER_PMP_FIRST)
232 * ata_dev_next - device iteration helper
233 * @dev: the previous device, NULL to start
234 * @link: ATA link containing devices to iterate
235 * @mode: iteration mode, one of ATA_DITER_*
238 * Host lock or EH context.
241 * Pointer to the next device.
243 struct ata_device *ata_dev_next(struct ata_device *dev, struct ata_link *link,
244 enum ata_dev_iter_mode mode)
246 BUG_ON(mode != ATA_DITER_ENABLED && mode != ATA_DITER_ENABLED_REVERSE &&
247 mode != ATA_DITER_ALL && mode != ATA_DITER_ALL_REVERSE);
249 /* NULL dev indicates start of iteration */
252 case ATA_DITER_ENABLED:
256 case ATA_DITER_ENABLED_REVERSE:
257 case ATA_DITER_ALL_REVERSE:
258 dev = link->device + ata_link_max_devices(link) - 1;
263 /* move to the next one */
265 case ATA_DITER_ENABLED:
267 if (++dev < link->device + ata_link_max_devices(link))
270 case ATA_DITER_ENABLED_REVERSE:
271 case ATA_DITER_ALL_REVERSE:
272 if (--dev >= link->device)
278 if ((mode == ATA_DITER_ENABLED || mode == ATA_DITER_ENABLED_REVERSE) &&
279 !ata_dev_enabled(dev))
285 * ata_dev_phys_link - find physical link for a device
286 * @dev: ATA device to look up physical link for
288 * Look up physical link which @dev is attached to. Note that
289 * this is different from @dev->link only when @dev is on slave
290 * link. For all other cases, it's the same as @dev->link.
296 * Pointer to the found physical link.
298 struct ata_link *ata_dev_phys_link(struct ata_device *dev)
300 struct ata_port *ap = dev->link->ap;
306 return ap->slave_link;
310 * ata_force_cbl - force cable type according to libata.force
311 * @ap: ATA port of interest
313 * Force cable type according to libata.force and whine about it.
314 * The last entry which has matching port number is used, so it
315 * can be specified as part of device force parameters. For
316 * example, both "a:40c,1.00:udma4" and "1.00:40c,udma4" have the
322 void ata_force_cbl(struct ata_port *ap)
326 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
327 const struct ata_force_ent *fe = &ata_force_tbl[i];
329 if (fe->port != -1 && fe->port != ap->print_id)
332 if (fe->param.cbl == ATA_CBL_NONE)
335 ap->cbl = fe->param.cbl;
336 ata_port_printk(ap, KERN_NOTICE,
337 "FORCE: cable set to %s\n", fe->param.name);
343 * ata_force_link_limits - force link limits according to libata.force
344 * @link: ATA link of interest
346 * Force link flags and SATA spd limit according to libata.force
347 * and whine about it. When only the port part is specified
348 * (e.g. 1:), the limit applies to all links connected to both
349 * the host link and all fan-out ports connected via PMP. If the
350 * device part is specified as 0 (e.g. 1.00:), it specifies the
351 * first fan-out link not the host link. Device number 15 always
352 * points to the host link whether PMP is attached or not. If the
353 * controller has slave link, device number 16 points to it.
358 static void ata_force_link_limits(struct ata_link *link)
360 bool did_spd = false;
361 int linkno = link->pmp;
364 if (ata_is_host_link(link))
367 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
368 const struct ata_force_ent *fe = &ata_force_tbl[i];
370 if (fe->port != -1 && fe->port != link->ap->print_id)
373 if (fe->device != -1 && fe->device != linkno)
376 /* only honor the first spd limit */
377 if (!did_spd && fe->param.spd_limit) {
378 link->hw_sata_spd_limit = (1 << fe->param.spd_limit) - 1;
379 ata_link_printk(link, KERN_NOTICE,
380 "FORCE: PHY spd limit set to %s\n",
385 /* let lflags stack */
386 if (fe->param.lflags) {
387 link->flags |= fe->param.lflags;
388 ata_link_printk(link, KERN_NOTICE,
389 "FORCE: link flag 0x%x forced -> 0x%x\n",
390 fe->param.lflags, link->flags);
396 * ata_force_xfermask - force xfermask according to libata.force
397 * @dev: ATA device of interest
399 * Force xfer_mask according to libata.force and whine about it.
400 * For consistency with link selection, device number 15 selects
401 * the first device connected to the host link.
406 static void ata_force_xfermask(struct ata_device *dev)
408 int devno = dev->link->pmp + dev->devno;
409 int alt_devno = devno;
412 /* allow n.15/16 for devices attached to host port */
413 if (ata_is_host_link(dev->link))
416 for (i = ata_force_tbl_size - 1; i >= 0; i--) {
417 const struct ata_force_ent *fe = &ata_force_tbl[i];
418 unsigned long pio_mask, mwdma_mask, udma_mask;
420 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
423 if (fe->device != -1 && fe->device != devno &&
424 fe->device != alt_devno)
427 if (!fe->param.xfer_mask)
430 ata_unpack_xfermask(fe->param.xfer_mask,
431 &pio_mask, &mwdma_mask, &udma_mask);
433 dev->udma_mask = udma_mask;
434 else if (mwdma_mask) {
436 dev->mwdma_mask = mwdma_mask;
440 dev->pio_mask = pio_mask;
443 ata_dev_printk(dev, KERN_NOTICE,
444 "FORCE: xfer_mask set to %s\n", fe->param.name);
450 * ata_force_horkage - force horkage according to libata.force
451 * @dev: ATA device of interest
453 * Force horkage according to libata.force and whine about it.
454 * For consistency with link selection, device number 15 selects
455 * the first device connected to the host link.
460 static void ata_force_horkage(struct ata_device *dev)
462 int devno = dev->link->pmp + dev->devno;
463 int alt_devno = devno;
466 /* allow n.15/16 for devices attached to host port */
467 if (ata_is_host_link(dev->link))
470 for (i = 0; i < ata_force_tbl_size; i++) {
471 const struct ata_force_ent *fe = &ata_force_tbl[i];
473 if (fe->port != -1 && fe->port != dev->link->ap->print_id)
476 if (fe->device != -1 && fe->device != devno &&
477 fe->device != alt_devno)
480 if (!(~dev->horkage & fe->param.horkage_on) &&
481 !(dev->horkage & fe->param.horkage_off))
484 dev->horkage |= fe->param.horkage_on;
485 dev->horkage &= ~fe->param.horkage_off;
487 ata_dev_printk(dev, KERN_NOTICE,
488 "FORCE: horkage modified (%s)\n", fe->param.name);
493 * atapi_cmd_type - Determine ATAPI command type from SCSI opcode
494 * @opcode: SCSI opcode
496 * Determine ATAPI command type from @opcode.
502 * ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC}
504 int atapi_cmd_type(u8 opcode)
513 case GPCMD_WRITE_AND_VERIFY_10:
517 case GPCMD_READ_CD_MSF:
518 return ATAPI_READ_CD;
522 if (atapi_passthru16)
523 return ATAPI_PASS_THRU;
531 * ata_tf_to_fis - Convert ATA taskfile to SATA FIS structure
532 * @tf: Taskfile to convert
533 * @pmp: Port multiplier port
534 * @is_cmd: This FIS is for command
535 * @fis: Buffer into which data will output
537 * Converts a standard ATA taskfile to a Serial ATA
538 * FIS structure (Register - Host to Device).
541 * Inherited from caller.
543 void ata_tf_to_fis(const struct ata_taskfile *tf, u8 pmp, int is_cmd, u8 *fis)
545 fis[0] = 0x27; /* Register - Host to Device FIS */
546 fis[1] = pmp & 0xf; /* Port multiplier number*/
548 fis[1] |= (1 << 7); /* bit 7 indicates Command FIS */
550 fis[2] = tf->command;
551 fis[3] = tf->feature;
558 fis[8] = tf->hob_lbal;
559 fis[9] = tf->hob_lbam;
560 fis[10] = tf->hob_lbah;
561 fis[11] = tf->hob_feature;
564 fis[13] = tf->hob_nsect;
575 * ata_tf_from_fis - Convert SATA FIS to ATA taskfile
576 * @fis: Buffer from which data will be input
577 * @tf: Taskfile to output
579 * Converts a serial ATA FIS structure to a standard ATA taskfile.
582 * Inherited from caller.
585 void ata_tf_from_fis(const u8 *fis, struct ata_taskfile *tf)
587 tf->command = fis[2]; /* status */
588 tf->feature = fis[3]; /* error */
595 tf->hob_lbal = fis[8];
596 tf->hob_lbam = fis[9];
597 tf->hob_lbah = fis[10];
600 tf->hob_nsect = fis[13];
603 static const u8 ata_rw_cmds[] = {
607 ATA_CMD_READ_MULTI_EXT,
608 ATA_CMD_WRITE_MULTI_EXT,
612 ATA_CMD_WRITE_MULTI_FUA_EXT,
616 ATA_CMD_PIO_READ_EXT,
617 ATA_CMD_PIO_WRITE_EXT,
630 ATA_CMD_WRITE_FUA_EXT
634 * ata_rwcmd_protocol - set taskfile r/w commands and protocol
635 * @tf: command to examine and configure
636 * @dev: device tf belongs to
638 * Examine the device configuration and tf->flags to calculate
639 * the proper read/write commands and protocol to use.
644 static int ata_rwcmd_protocol(struct ata_taskfile *tf, struct ata_device *dev)
648 int index, fua, lba48, write;
650 fua = (tf->flags & ATA_TFLAG_FUA) ? 4 : 0;
651 lba48 = (tf->flags & ATA_TFLAG_LBA48) ? 2 : 0;
652 write = (tf->flags & ATA_TFLAG_WRITE) ? 1 : 0;
654 if (dev->flags & ATA_DFLAG_PIO) {
655 tf->protocol = ATA_PROT_PIO;
656 index = dev->multi_count ? 0 : 8;
657 } else if (lba48 && (dev->link->ap->flags & ATA_FLAG_PIO_LBA48)) {
658 /* Unable to use DMA due to host limitation */
659 tf->protocol = ATA_PROT_PIO;
660 index = dev->multi_count ? 0 : 8;
662 tf->protocol = ATA_PROT_DMA;
666 cmd = ata_rw_cmds[index + fua + lba48 + write];
675 * ata_tf_read_block - Read block address from ATA taskfile
676 * @tf: ATA taskfile of interest
677 * @dev: ATA device @tf belongs to
682 * Read block address from @tf. This function can handle all
683 * three address formats - LBA, LBA48 and CHS. tf->protocol and
684 * flags select the address format to use.
687 * Block address read from @tf.
689 u64 ata_tf_read_block(struct ata_taskfile *tf, struct ata_device *dev)
693 if (tf->flags & ATA_TFLAG_LBA) {
694 if (tf->flags & ATA_TFLAG_LBA48) {
695 block |= (u64)tf->hob_lbah << 40;
696 block |= (u64)tf->hob_lbam << 32;
697 block |= (u64)tf->hob_lbal << 24;
699 block |= (tf->device & 0xf) << 24;
701 block |= tf->lbah << 16;
702 block |= tf->lbam << 8;
707 cyl = tf->lbam | (tf->lbah << 8);
708 head = tf->device & 0xf;
711 block = (cyl * dev->heads + head) * dev->sectors + sect;
718 * ata_build_rw_tf - Build ATA taskfile for given read/write request
719 * @tf: Target ATA taskfile
720 * @dev: ATA device @tf belongs to
721 * @block: Block address
722 * @n_block: Number of blocks
723 * @tf_flags: RW/FUA etc...
729 * Build ATA taskfile @tf for read/write request described by
730 * @block, @n_block, @tf_flags and @tag on @dev.
734 * 0 on success, -ERANGE if the request is too large for @dev,
735 * -EINVAL if the request is invalid.
737 int ata_build_rw_tf(struct ata_taskfile *tf, struct ata_device *dev,
738 u64 block, u32 n_block, unsigned int tf_flags,
741 tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
742 tf->flags |= tf_flags;
744 if (ata_ncq_enabled(dev) && likely(tag != ATA_TAG_INTERNAL)) {
746 if (!lba_48_ok(block, n_block))
749 tf->protocol = ATA_PROT_NCQ;
750 tf->flags |= ATA_TFLAG_LBA | ATA_TFLAG_LBA48;
752 if (tf->flags & ATA_TFLAG_WRITE)
753 tf->command = ATA_CMD_FPDMA_WRITE;
755 tf->command = ATA_CMD_FPDMA_READ;
757 tf->nsect = tag << 3;
758 tf->hob_feature = (n_block >> 8) & 0xff;
759 tf->feature = n_block & 0xff;
761 tf->hob_lbah = (block >> 40) & 0xff;
762 tf->hob_lbam = (block >> 32) & 0xff;
763 tf->hob_lbal = (block >> 24) & 0xff;
764 tf->lbah = (block >> 16) & 0xff;
765 tf->lbam = (block >> 8) & 0xff;
766 tf->lbal = block & 0xff;
769 if (tf->flags & ATA_TFLAG_FUA)
770 tf->device |= 1 << 7;
771 } else if (dev->flags & ATA_DFLAG_LBA) {
772 tf->flags |= ATA_TFLAG_LBA;
774 if (lba_28_ok(block, n_block)) {
776 tf->device |= (block >> 24) & 0xf;
777 } else if (lba_48_ok(block, n_block)) {
778 if (!(dev->flags & ATA_DFLAG_LBA48))
782 tf->flags |= ATA_TFLAG_LBA48;
784 tf->hob_nsect = (n_block >> 8) & 0xff;
786 tf->hob_lbah = (block >> 40) & 0xff;
787 tf->hob_lbam = (block >> 32) & 0xff;
788 tf->hob_lbal = (block >> 24) & 0xff;
790 /* request too large even for LBA48 */
793 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
796 tf->nsect = n_block & 0xff;
798 tf->lbah = (block >> 16) & 0xff;
799 tf->lbam = (block >> 8) & 0xff;
800 tf->lbal = block & 0xff;
802 tf->device |= ATA_LBA;
805 u32 sect, head, cyl, track;
807 /* The request -may- be too large for CHS addressing. */
808 if (!lba_28_ok(block, n_block))
811 if (unlikely(ata_rwcmd_protocol(tf, dev) < 0))
814 /* Convert LBA to CHS */
815 track = (u32)block / dev->sectors;
816 cyl = track / dev->heads;
817 head = track % dev->heads;
818 sect = (u32)block % dev->sectors + 1;
820 DPRINTK("block %u track %u cyl %u head %u sect %u\n",
821 (u32)block, track, cyl, head, sect);
823 /* Check whether the converted CHS can fit.
827 if ((cyl >> 16) || (head >> 4) || (sect >> 8) || (!sect))
830 tf->nsect = n_block & 0xff; /* Sector count 0 means 256 sectors */
841 * ata_pack_xfermask - Pack pio, mwdma and udma masks into xfer_mask
842 * @pio_mask: pio_mask
843 * @mwdma_mask: mwdma_mask
844 * @udma_mask: udma_mask
846 * Pack @pio_mask, @mwdma_mask and @udma_mask into a single
847 * unsigned int xfer_mask.
855 unsigned long ata_pack_xfermask(unsigned long pio_mask,
856 unsigned long mwdma_mask,
857 unsigned long udma_mask)
859 return ((pio_mask << ATA_SHIFT_PIO) & ATA_MASK_PIO) |
860 ((mwdma_mask << ATA_SHIFT_MWDMA) & ATA_MASK_MWDMA) |
861 ((udma_mask << ATA_SHIFT_UDMA) & ATA_MASK_UDMA);
865 * ata_unpack_xfermask - Unpack xfer_mask into pio, mwdma and udma masks
866 * @xfer_mask: xfer_mask to unpack
867 * @pio_mask: resulting pio_mask
868 * @mwdma_mask: resulting mwdma_mask
869 * @udma_mask: resulting udma_mask
871 * Unpack @xfer_mask into @pio_mask, @mwdma_mask and @udma_mask.
872 * Any NULL distination masks will be ignored.
874 void ata_unpack_xfermask(unsigned long xfer_mask, unsigned long *pio_mask,
875 unsigned long *mwdma_mask, unsigned long *udma_mask)
878 *pio_mask = (xfer_mask & ATA_MASK_PIO) >> ATA_SHIFT_PIO;
880 *mwdma_mask = (xfer_mask & ATA_MASK_MWDMA) >> ATA_SHIFT_MWDMA;
882 *udma_mask = (xfer_mask & ATA_MASK_UDMA) >> ATA_SHIFT_UDMA;
885 static const struct ata_xfer_ent {
889 { ATA_SHIFT_PIO, ATA_NR_PIO_MODES, XFER_PIO_0 },
890 { ATA_SHIFT_MWDMA, ATA_NR_MWDMA_MODES, XFER_MW_DMA_0 },
891 { ATA_SHIFT_UDMA, ATA_NR_UDMA_MODES, XFER_UDMA_0 },
896 * ata_xfer_mask2mode - Find matching XFER_* for the given xfer_mask
897 * @xfer_mask: xfer_mask of interest
899 * Return matching XFER_* value for @xfer_mask. Only the highest
900 * bit of @xfer_mask is considered.
906 * Matching XFER_* value, 0xff if no match found.
908 u8 ata_xfer_mask2mode(unsigned long xfer_mask)
910 int highbit = fls(xfer_mask) - 1;
911 const struct ata_xfer_ent *ent;
913 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
914 if (highbit >= ent->shift && highbit < ent->shift + ent->bits)
915 return ent->base + highbit - ent->shift;
920 * ata_xfer_mode2mask - Find matching xfer_mask for XFER_*
921 * @xfer_mode: XFER_* of interest
923 * Return matching xfer_mask for @xfer_mode.
929 * Matching xfer_mask, 0 if no match found.
931 unsigned long ata_xfer_mode2mask(u8 xfer_mode)
933 const struct ata_xfer_ent *ent;
935 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
936 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
937 return ((2 << (ent->shift + xfer_mode - ent->base)) - 1)
938 & ~((1 << ent->shift) - 1);
943 * ata_xfer_mode2shift - Find matching xfer_shift for XFER_*
944 * @xfer_mode: XFER_* of interest
946 * Return matching xfer_shift for @xfer_mode.
952 * Matching xfer_shift, -1 if no match found.
954 int ata_xfer_mode2shift(unsigned long xfer_mode)
956 const struct ata_xfer_ent *ent;
958 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
959 if (xfer_mode >= ent->base && xfer_mode < ent->base + ent->bits)
965 * ata_mode_string - convert xfer_mask to string
966 * @xfer_mask: mask of bits supported; only highest bit counts.
968 * Determine string which represents the highest speed
969 * (highest bit in @modemask).
975 * Constant C string representing highest speed listed in
976 * @mode_mask, or the constant C string "<n/a>".
978 const char *ata_mode_string(unsigned long xfer_mask)
980 static const char * const xfer_mode_str[] = {
1004 highbit = fls(xfer_mask) - 1;
1005 if (highbit >= 0 && highbit < ARRAY_SIZE(xfer_mode_str))
1006 return xfer_mode_str[highbit];
1010 static const char *sata_spd_string(unsigned int spd)
1012 static const char * const spd_str[] = {
1018 if (spd == 0 || (spd - 1) >= ARRAY_SIZE(spd_str))
1020 return spd_str[spd - 1];
1023 static int ata_dev_set_dipm(struct ata_device *dev, enum link_pm policy)
1025 struct ata_link *link = dev->link;
1026 struct ata_port *ap = link->ap;
1028 unsigned int err_mask;
1032 * disallow DIPM for drivers which haven't set
1033 * ATA_FLAG_IPM. This is because when DIPM is enabled,
1034 * phy ready will be set in the interrupt status on
1035 * state changes, which will cause some drivers to
1036 * think there are errors - additionally drivers will
1037 * need to disable hot plug.
1039 if (!(ap->flags & ATA_FLAG_IPM) || !ata_dev_enabled(dev)) {
1040 ap->pm_policy = NOT_AVAILABLE;
1045 * For DIPM, we will only enable it for the
1046 * min_power setting.
1048 * Why? Because Disks are too stupid to know that
1049 * If the host rejects a request to go to SLUMBER
1050 * they should retry at PARTIAL, and instead it
1051 * just would give up. So, for medium_power to
1052 * work at all, we need to only allow HIPM.
1054 rc = sata_scr_read(link, SCR_CONTROL, &scontrol);
1060 /* no restrictions on IPM transitions */
1061 scontrol &= ~(0x3 << 8);
1062 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
1067 if (dev->flags & ATA_DFLAG_DIPM)
1068 err_mask = ata_dev_set_feature(dev,
1069 SETFEATURES_SATA_ENABLE, SATA_DIPM);
1072 /* allow IPM to PARTIAL */
1073 scontrol &= ~(0x1 << 8);
1074 scontrol |= (0x2 << 8);
1075 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
1080 * we don't have to disable DIPM since IPM flags
1081 * disallow transitions to SLUMBER, which effectively
1082 * disable DIPM if it does not support PARTIAL
1086 case MAX_PERFORMANCE:
1087 /* disable all IPM transitions */
1088 scontrol |= (0x3 << 8);
1089 rc = sata_scr_write(link, SCR_CONTROL, scontrol);
1094 * we don't have to disable DIPM since IPM flags
1095 * disallow all transitions which effectively
1096 * disable DIPM anyway.
1101 /* FIXME: handle SET FEATURES failure */
1108 * ata_dev_enable_pm - enable SATA interface power management
1109 * @dev: device to enable power management
1110 * @policy: the link power management policy
1112 * Enable SATA Interface power management. This will enable
1113 * Device Interface Power Management (DIPM) for min_power
1114 * policy, and then call driver specific callbacks for
1115 * enabling Host Initiated Power management.
1118 * Returns: -EINVAL if IPM is not supported, 0 otherwise.
1120 void ata_dev_enable_pm(struct ata_device *dev, enum link_pm policy)
1123 struct ata_port *ap = dev->link->ap;
1125 /* set HIPM first, then DIPM */
1126 if (ap->ops->enable_pm)
1127 rc = ap->ops->enable_pm(ap, policy);
1130 rc = ata_dev_set_dipm(dev, policy);
1134 ap->pm_policy = MAX_PERFORMANCE;
1136 ap->pm_policy = policy;
1137 return /* rc */; /* hopefully we can use 'rc' eventually */
1142 * ata_dev_disable_pm - disable SATA interface power management
1143 * @dev: device to disable power management
1145 * Disable SATA Interface power management. This will disable
1146 * Device Interface Power Management (DIPM) without changing
1147 * policy, call driver specific callbacks for disabling Host
1148 * Initiated Power management.
1153 static void ata_dev_disable_pm(struct ata_device *dev)
1155 struct ata_port *ap = dev->link->ap;
1157 ata_dev_set_dipm(dev, MAX_PERFORMANCE);
1158 if (ap->ops->disable_pm)
1159 ap->ops->disable_pm(ap);
1161 #endif /* CONFIG_PM */
1163 void ata_lpm_schedule(struct ata_port *ap, enum link_pm policy)
1165 ap->pm_policy = policy;
1166 ap->link.eh_info.action |= ATA_EH_LPM;
1167 ap->link.eh_info.flags |= ATA_EHI_NO_AUTOPSY;
1168 ata_port_schedule_eh(ap);
1172 static void ata_lpm_enable(struct ata_host *host)
1174 struct ata_link *link;
1175 struct ata_port *ap;
1176 struct ata_device *dev;
1179 for (i = 0; i < host->n_ports; i++) {
1180 ap = host->ports[i];
1181 ata_for_each_link(link, ap, EDGE) {
1182 ata_for_each_dev(dev, link, ALL)
1183 ata_dev_disable_pm(dev);
1188 static void ata_lpm_disable(struct ata_host *host)
1192 for (i = 0; i < host->n_ports; i++) {
1193 struct ata_port *ap = host->ports[i];
1194 ata_lpm_schedule(ap, ap->pm_policy);
1197 #endif /* CONFIG_PM */
1200 * ata_dev_classify - determine device type based on ATA-spec signature
1201 * @tf: ATA taskfile register set for device to be identified
1203 * Determine from taskfile register contents whether a device is
1204 * ATA or ATAPI, as per "Signature and persistence" section
1205 * of ATA/PI spec (volume 1, sect 5.14).
1211 * Device type, %ATA_DEV_ATA, %ATA_DEV_ATAPI, %ATA_DEV_PMP or
1212 * %ATA_DEV_UNKNOWN the event of failure.
1214 unsigned int ata_dev_classify(const struct ata_taskfile *tf)
1216 /* Apple's open source Darwin code hints that some devices only
1217 * put a proper signature into the LBA mid/high registers,
1218 * So, we only check those. It's sufficient for uniqueness.
1220 * ATA/ATAPI-7 (d1532v1r1: Feb. 19, 2003) specified separate
1221 * signatures for ATA and ATAPI devices attached on SerialATA,
1222 * 0x3c/0xc3 and 0x69/0x96 respectively. However, SerialATA
1223 * spec has never mentioned about using different signatures
1224 * for ATA/ATAPI devices. Then, Serial ATA II: Port
1225 * Multiplier specification began to use 0x69/0x96 to identify
1226 * port multpliers and 0x3c/0xc3 to identify SEMB device.
1227 * ATA/ATAPI-7 dropped descriptions about 0x3c/0xc3 and
1228 * 0x69/0x96 shortly and described them as reserved for
1231 * We follow the current spec and consider that 0x69/0x96
1232 * identifies a port multiplier and 0x3c/0xc3 a SEMB device.
1234 if ((tf->lbam == 0) && (tf->lbah == 0)) {
1235 DPRINTK("found ATA device by sig\n");
1239 if ((tf->lbam == 0x14) && (tf->lbah == 0xeb)) {
1240 DPRINTK("found ATAPI device by sig\n");
1241 return ATA_DEV_ATAPI;
1244 if ((tf->lbam == 0x69) && (tf->lbah == 0x96)) {
1245 DPRINTK("found PMP device by sig\n");
1249 if ((tf->lbam == 0x3c) && (tf->lbah == 0xc3)) {
1250 printk(KERN_INFO "ata: SEMB device ignored\n");
1251 return ATA_DEV_SEMB_UNSUP; /* not yet */
1254 DPRINTK("unknown device\n");
1255 return ATA_DEV_UNKNOWN;
1259 * ata_id_string - Convert IDENTIFY DEVICE page into string
1260 * @id: IDENTIFY DEVICE results we will examine
1261 * @s: string into which data is output
1262 * @ofs: offset into identify device page
1263 * @len: length of string to return. must be an even number.
1265 * The strings in the IDENTIFY DEVICE page are broken up into
1266 * 16-bit chunks. Run through the string, and output each
1267 * 8-bit chunk linearly, regardless of platform.
1273 void ata_id_string(const u16 *id, unsigned char *s,
1274 unsigned int ofs, unsigned int len)
1295 * ata_id_c_string - Convert IDENTIFY DEVICE page into C string
1296 * @id: IDENTIFY DEVICE results we will examine
1297 * @s: string into which data is output
1298 * @ofs: offset into identify device page
1299 * @len: length of string to return. must be an odd number.
1301 * This function is identical to ata_id_string except that it
1302 * trims trailing spaces and terminates the resulting string with
1303 * null. @len must be actual maximum length (even number) + 1.
1308 void ata_id_c_string(const u16 *id, unsigned char *s,
1309 unsigned int ofs, unsigned int len)
1313 ata_id_string(id, s, ofs, len - 1);
1315 p = s + strnlen(s, len - 1);
1316 while (p > s && p[-1] == ' ')
1321 static u64 ata_id_n_sectors(const u16 *id)
1323 if (ata_id_has_lba(id)) {
1324 if (ata_id_has_lba48(id))
1325 return ata_id_u64(id, 100);
1327 return ata_id_u32(id, 60);
1329 if (ata_id_current_chs_valid(id))
1330 return ata_id_u32(id, 57);
1332 return id[1] * id[3] * id[6];
1336 u64 ata_tf_to_lba48(const struct ata_taskfile *tf)
1340 sectors |= ((u64)(tf->hob_lbah & 0xff)) << 40;
1341 sectors |= ((u64)(tf->hob_lbam & 0xff)) << 32;
1342 sectors |= ((u64)(tf->hob_lbal & 0xff)) << 24;
1343 sectors |= (tf->lbah & 0xff) << 16;
1344 sectors |= (tf->lbam & 0xff) << 8;
1345 sectors |= (tf->lbal & 0xff);
1350 u64 ata_tf_to_lba(const struct ata_taskfile *tf)
1354 sectors |= (tf->device & 0x0f) << 24;
1355 sectors |= (tf->lbah & 0xff) << 16;
1356 sectors |= (tf->lbam & 0xff) << 8;
1357 sectors |= (tf->lbal & 0xff);
1363 * ata_read_native_max_address - Read native max address
1364 * @dev: target device
1365 * @max_sectors: out parameter for the result native max address
1367 * Perform an LBA48 or LBA28 native size query upon the device in
1371 * 0 on success, -EACCES if command is aborted by the drive.
1372 * -EIO on other errors.
1374 static int ata_read_native_max_address(struct ata_device *dev, u64 *max_sectors)
1376 unsigned int err_mask;
1377 struct ata_taskfile tf;
1378 int lba48 = ata_id_has_lba48(dev->id);
1380 ata_tf_init(dev, &tf);
1382 /* always clear all address registers */
1383 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1386 tf.command = ATA_CMD_READ_NATIVE_MAX_EXT;
1387 tf.flags |= ATA_TFLAG_LBA48;
1389 tf.command = ATA_CMD_READ_NATIVE_MAX;
1391 tf.protocol |= ATA_PROT_NODATA;
1392 tf.device |= ATA_LBA;
1394 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1396 ata_dev_printk(dev, KERN_WARNING, "failed to read native "
1397 "max address (err_mask=0x%x)\n", err_mask);
1398 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
1404 *max_sectors = ata_tf_to_lba48(&tf) + 1;
1406 *max_sectors = ata_tf_to_lba(&tf) + 1;
1407 if (dev->horkage & ATA_HORKAGE_HPA_SIZE)
1413 * ata_set_max_sectors - Set max sectors
1414 * @dev: target device
1415 * @new_sectors: new max sectors value to set for the device
1417 * Set max sectors of @dev to @new_sectors.
1420 * 0 on success, -EACCES if command is aborted or denied (due to
1421 * previous non-volatile SET_MAX) by the drive. -EIO on other
1424 static int ata_set_max_sectors(struct ata_device *dev, u64 new_sectors)
1426 unsigned int err_mask;
1427 struct ata_taskfile tf;
1428 int lba48 = ata_id_has_lba48(dev->id);
1432 ata_tf_init(dev, &tf);
1434 tf.flags |= ATA_TFLAG_DEVICE | ATA_TFLAG_ISADDR;
1437 tf.command = ATA_CMD_SET_MAX_EXT;
1438 tf.flags |= ATA_TFLAG_LBA48;
1440 tf.hob_lbal = (new_sectors >> 24) & 0xff;
1441 tf.hob_lbam = (new_sectors >> 32) & 0xff;
1442 tf.hob_lbah = (new_sectors >> 40) & 0xff;
1444 tf.command = ATA_CMD_SET_MAX;
1446 tf.device |= (new_sectors >> 24) & 0xf;
1449 tf.protocol |= ATA_PROT_NODATA;
1450 tf.device |= ATA_LBA;
1452 tf.lbal = (new_sectors >> 0) & 0xff;
1453 tf.lbam = (new_sectors >> 8) & 0xff;
1454 tf.lbah = (new_sectors >> 16) & 0xff;
1456 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1458 ata_dev_printk(dev, KERN_WARNING, "failed to set "
1459 "max address (err_mask=0x%x)\n", err_mask);
1460 if (err_mask == AC_ERR_DEV &&
1461 (tf.feature & (ATA_ABORTED | ATA_IDNF)))
1470 * ata_hpa_resize - Resize a device with an HPA set
1471 * @dev: Device to resize
1473 * Read the size of an LBA28 or LBA48 disk with HPA features and resize
1474 * it if required to the full size of the media. The caller must check
1475 * the drive has the HPA feature set enabled.
1478 * 0 on success, -errno on failure.
1480 static int ata_hpa_resize(struct ata_device *dev)
1482 struct ata_eh_context *ehc = &dev->link->eh_context;
1483 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
1484 u64 sectors = ata_id_n_sectors(dev->id);
1488 /* do we need to do it? */
1489 if (dev->class != ATA_DEV_ATA ||
1490 !ata_id_has_lba(dev->id) || !ata_id_hpa_enabled(dev->id) ||
1491 (dev->horkage & ATA_HORKAGE_BROKEN_HPA))
1494 /* read native max address */
1495 rc = ata_read_native_max_address(dev, &native_sectors);
1497 /* If device aborted the command or HPA isn't going to
1498 * be unlocked, skip HPA resizing.
1500 if (rc == -EACCES || !ata_ignore_hpa) {
1501 ata_dev_printk(dev, KERN_WARNING, "HPA support seems "
1502 "broken, skipping HPA handling\n");
1503 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1505 /* we can continue if device aborted the command */
1513 /* nothing to do? */
1514 if (native_sectors <= sectors || !ata_ignore_hpa) {
1515 if (!print_info || native_sectors == sectors)
1518 if (native_sectors > sectors)
1519 ata_dev_printk(dev, KERN_INFO,
1520 "HPA detected: current %llu, native %llu\n",
1521 (unsigned long long)sectors,
1522 (unsigned long long)native_sectors);
1523 else if (native_sectors < sectors)
1524 ata_dev_printk(dev, KERN_WARNING,
1525 "native sectors (%llu) is smaller than "
1527 (unsigned long long)native_sectors,
1528 (unsigned long long)sectors);
1532 /* let's unlock HPA */
1533 rc = ata_set_max_sectors(dev, native_sectors);
1534 if (rc == -EACCES) {
1535 /* if device aborted the command, skip HPA resizing */
1536 ata_dev_printk(dev, KERN_WARNING, "device aborted resize "
1537 "(%llu -> %llu), skipping HPA handling\n",
1538 (unsigned long long)sectors,
1539 (unsigned long long)native_sectors);
1540 dev->horkage |= ATA_HORKAGE_BROKEN_HPA;
1545 /* re-read IDENTIFY data */
1546 rc = ata_dev_reread_id(dev, 0);
1548 ata_dev_printk(dev, KERN_ERR, "failed to re-read IDENTIFY "
1549 "data after HPA resizing\n");
1554 u64 new_sectors = ata_id_n_sectors(dev->id);
1555 ata_dev_printk(dev, KERN_INFO,
1556 "HPA unlocked: %llu -> %llu, native %llu\n",
1557 (unsigned long long)sectors,
1558 (unsigned long long)new_sectors,
1559 (unsigned long long)native_sectors);
1566 * ata_dump_id - IDENTIFY DEVICE info debugging output
1567 * @id: IDENTIFY DEVICE page to dump
1569 * Dump selected 16-bit words from the given IDENTIFY DEVICE
1576 static inline void ata_dump_id(const u16 *id)
1578 DPRINTK("49==0x%04x "
1588 DPRINTK("80==0x%04x "
1598 DPRINTK("88==0x%04x "
1605 * ata_id_xfermask - Compute xfermask from the given IDENTIFY data
1606 * @id: IDENTIFY data to compute xfer mask from
1608 * Compute the xfermask for this device. This is not as trivial
1609 * as it seems if we must consider early devices correctly.
1611 * FIXME: pre IDE drive timing (do we care ?).
1619 unsigned long ata_id_xfermask(const u16 *id)
1621 unsigned long pio_mask, mwdma_mask, udma_mask;
1623 /* Usual case. Word 53 indicates word 64 is valid */
1624 if (id[ATA_ID_FIELD_VALID] & (1 << 1)) {
1625 pio_mask = id[ATA_ID_PIO_MODES] & 0x03;
1629 /* If word 64 isn't valid then Word 51 high byte holds
1630 * the PIO timing number for the maximum. Turn it into
1633 u8 mode = (id[ATA_ID_OLD_PIO_MODES] >> 8) & 0xFF;
1634 if (mode < 5) /* Valid PIO range */
1635 pio_mask = (2 << mode) - 1;
1639 /* But wait.. there's more. Design your standards by
1640 * committee and you too can get a free iordy field to
1641 * process. However its the speeds not the modes that
1642 * are supported... Note drivers using the timing API
1643 * will get this right anyway
1647 mwdma_mask = id[ATA_ID_MWDMA_MODES] & 0x07;
1649 if (ata_id_is_cfa(id)) {
1651 * Process compact flash extended modes
1653 int pio = id[163] & 0x7;
1654 int dma = (id[163] >> 3) & 7;
1657 pio_mask |= (1 << 5);
1659 pio_mask |= (1 << 6);
1661 mwdma_mask |= (1 << 3);
1663 mwdma_mask |= (1 << 4);
1667 if (id[ATA_ID_FIELD_VALID] & (1 << 2))
1668 udma_mask = id[ATA_ID_UDMA_MODES] & 0xff;
1670 return ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
1674 * ata_pio_queue_task - Queue port_task
1675 * @ap: The ata_port to queue port_task for
1676 * @data: data for @fn to use
1677 * @delay: delay time in msecs for workqueue function
1679 * Schedule @fn(@data) for execution after @delay jiffies using
1680 * port_task. There is one port_task per port and it's the
1681 * user(low level driver)'s responsibility to make sure that only
1682 * one task is active at any given time.
1684 * libata core layer takes care of synchronization between
1685 * port_task and EH. ata_pio_queue_task() may be ignored for EH
1689 * Inherited from caller.
1691 void ata_pio_queue_task(struct ata_port *ap, void *data, unsigned long delay)
1693 ap->port_task_data = data;
1695 /* may fail if ata_port_flush_task() in progress */
1696 queue_delayed_work(ata_wq, &ap->port_task, msecs_to_jiffies(delay));
1700 * ata_port_flush_task - Flush port_task
1701 * @ap: The ata_port to flush port_task for
1703 * After this function completes, port_task is guranteed not to
1704 * be running or scheduled.
1707 * Kernel thread context (may sleep)
1709 void ata_port_flush_task(struct ata_port *ap)
1713 cancel_rearming_delayed_work(&ap->port_task);
1715 if (ata_msg_ctl(ap))
1716 ata_port_printk(ap, KERN_DEBUG, "%s: EXIT\n", __func__);
1719 static void ata_qc_complete_internal(struct ata_queued_cmd *qc)
1721 struct completion *waiting = qc->private_data;
1727 * ata_exec_internal_sg - execute libata internal command
1728 * @dev: Device to which the command is sent
1729 * @tf: Taskfile registers for the command and the result
1730 * @cdb: CDB for packet command
1731 * @dma_dir: Data tranfer direction of the command
1732 * @sgl: sg list for the data buffer of the command
1733 * @n_elem: Number of sg entries
1734 * @timeout: Timeout in msecs (0 for default)
1736 * Executes libata internal command with timeout. @tf contains
1737 * command on entry and result on return. Timeout and error
1738 * conditions are reported via return value. No recovery action
1739 * is taken after a command times out. It's caller's duty to
1740 * clean up after timeout.
1743 * None. Should be called with kernel context, might sleep.
1746 * Zero on success, AC_ERR_* mask on failure
1748 unsigned ata_exec_internal_sg(struct ata_device *dev,
1749 struct ata_taskfile *tf, const u8 *cdb,
1750 int dma_dir, struct scatterlist *sgl,
1751 unsigned int n_elem, unsigned long timeout)
1753 struct ata_link *link = dev->link;
1754 struct ata_port *ap = link->ap;
1755 u8 command = tf->command;
1756 int auto_timeout = 0;
1757 struct ata_queued_cmd *qc;
1758 unsigned int tag, preempted_tag;
1759 u32 preempted_sactive, preempted_qc_active;
1760 int preempted_nr_active_links;
1761 DECLARE_COMPLETION_ONSTACK(wait);
1762 unsigned long flags;
1763 unsigned int err_mask;
1766 spin_lock_irqsave(ap->lock, flags);
1768 /* no internal command while frozen */
1769 if (ap->pflags & ATA_PFLAG_FROZEN) {
1770 spin_unlock_irqrestore(ap->lock, flags);
1771 return AC_ERR_SYSTEM;
1774 /* initialize internal qc */
1776 /* XXX: Tag 0 is used for drivers with legacy EH as some
1777 * drivers choke if any other tag is given. This breaks
1778 * ata_tag_internal() test for those drivers. Don't use new
1779 * EH stuff without converting to it.
1781 if (ap->ops->error_handler)
1782 tag = ATA_TAG_INTERNAL;
1786 if (test_and_set_bit(tag, &ap->qc_allocated))
1788 qc = __ata_qc_from_tag(ap, tag);
1796 preempted_tag = link->active_tag;
1797 preempted_sactive = link->sactive;
1798 preempted_qc_active = ap->qc_active;
1799 preempted_nr_active_links = ap->nr_active_links;
1800 link->active_tag = ATA_TAG_POISON;
1803 ap->nr_active_links = 0;
1805 /* prepare & issue qc */
1808 memcpy(qc->cdb, cdb, ATAPI_CDB_LEN);
1809 qc->flags |= ATA_QCFLAG_RESULT_TF;
1810 qc->dma_dir = dma_dir;
1811 if (dma_dir != DMA_NONE) {
1812 unsigned int i, buflen = 0;
1813 struct scatterlist *sg;
1815 for_each_sg(sgl, sg, n_elem, i)
1816 buflen += sg->length;
1818 ata_sg_init(qc, sgl, n_elem);
1819 qc->nbytes = buflen;
1822 qc->private_data = &wait;
1823 qc->complete_fn = ata_qc_complete_internal;
1827 spin_unlock_irqrestore(ap->lock, flags);
1830 if (ata_probe_timeout)
1831 timeout = ata_probe_timeout * 1000;
1833 timeout = ata_internal_cmd_timeout(dev, command);
1838 rc = wait_for_completion_timeout(&wait, msecs_to_jiffies(timeout));
1840 ata_port_flush_task(ap);
1843 spin_lock_irqsave(ap->lock, flags);
1845 /* We're racing with irq here. If we lose, the
1846 * following test prevents us from completing the qc
1847 * twice. If we win, the port is frozen and will be
1848 * cleaned up by ->post_internal_cmd().
1850 if (qc->flags & ATA_QCFLAG_ACTIVE) {
1851 qc->err_mask |= AC_ERR_TIMEOUT;
1853 if (ap->ops->error_handler)
1854 ata_port_freeze(ap);
1856 ata_qc_complete(qc);
1858 if (ata_msg_warn(ap))
1859 ata_dev_printk(dev, KERN_WARNING,
1860 "qc timeout (cmd 0x%x)\n", command);
1863 spin_unlock_irqrestore(ap->lock, flags);
1866 /* do post_internal_cmd */
1867 if (ap->ops->post_internal_cmd)
1868 ap->ops->post_internal_cmd(qc);
1870 /* perform minimal error analysis */
1871 if (qc->flags & ATA_QCFLAG_FAILED) {
1872 if (qc->result_tf.command & (ATA_ERR | ATA_DF))
1873 qc->err_mask |= AC_ERR_DEV;
1876 qc->err_mask |= AC_ERR_OTHER;
1878 if (qc->err_mask & ~AC_ERR_OTHER)
1879 qc->err_mask &= ~AC_ERR_OTHER;
1883 spin_lock_irqsave(ap->lock, flags);
1885 *tf = qc->result_tf;
1886 err_mask = qc->err_mask;
1889 link->active_tag = preempted_tag;
1890 link->sactive = preempted_sactive;
1891 ap->qc_active = preempted_qc_active;
1892 ap->nr_active_links = preempted_nr_active_links;
1894 /* XXX - Some LLDDs (sata_mv) disable port on command failure.
1895 * Until those drivers are fixed, we detect the condition
1896 * here, fail the command with AC_ERR_SYSTEM and reenable the
1899 * Note that this doesn't change any behavior as internal
1900 * command failure results in disabling the device in the
1901 * higher layer for LLDDs without new reset/EH callbacks.
1903 * Kill the following code as soon as those drivers are fixed.
1905 if (ap->flags & ATA_FLAG_DISABLED) {
1906 err_mask |= AC_ERR_SYSTEM;
1910 spin_unlock_irqrestore(ap->lock, flags);
1912 if ((err_mask & AC_ERR_TIMEOUT) && auto_timeout)
1913 ata_internal_cmd_timed_out(dev, command);
1919 * ata_exec_internal - execute libata internal command
1920 * @dev: Device to which the command is sent
1921 * @tf: Taskfile registers for the command and the result
1922 * @cdb: CDB for packet command
1923 * @dma_dir: Data tranfer direction of the command
1924 * @buf: Data buffer of the command
1925 * @buflen: Length of data buffer
1926 * @timeout: Timeout in msecs (0 for default)
1928 * Wrapper around ata_exec_internal_sg() which takes simple
1929 * buffer instead of sg list.
1932 * None. Should be called with kernel context, might sleep.
1935 * Zero on success, AC_ERR_* mask on failure
1937 unsigned ata_exec_internal(struct ata_device *dev,
1938 struct ata_taskfile *tf, const u8 *cdb,
1939 int dma_dir, void *buf, unsigned int buflen,
1940 unsigned long timeout)
1942 struct scatterlist *psg = NULL, sg;
1943 unsigned int n_elem = 0;
1945 if (dma_dir != DMA_NONE) {
1947 sg_init_one(&sg, buf, buflen);
1952 return ata_exec_internal_sg(dev, tf, cdb, dma_dir, psg, n_elem,
1957 * ata_do_simple_cmd - execute simple internal command
1958 * @dev: Device to which the command is sent
1959 * @cmd: Opcode to execute
1961 * Execute a 'simple' command, that only consists of the opcode
1962 * 'cmd' itself, without filling any other registers
1965 * Kernel thread context (may sleep).
1968 * Zero on success, AC_ERR_* mask on failure
1970 unsigned int ata_do_simple_cmd(struct ata_device *dev, u8 cmd)
1972 struct ata_taskfile tf;
1974 ata_tf_init(dev, &tf);
1977 tf.flags |= ATA_TFLAG_DEVICE;
1978 tf.protocol = ATA_PROT_NODATA;
1980 return ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
1984 * ata_pio_need_iordy - check if iordy needed
1987 * Check if the current speed of the device requires IORDY. Used
1988 * by various controllers for chip configuration.
1991 unsigned int ata_pio_need_iordy(const struct ata_device *adev)
1993 /* Controller doesn't support IORDY. Probably a pointless check
1994 as the caller should know this */
1995 if (adev->link->ap->flags & ATA_FLAG_NO_IORDY)
1997 /* CF spec. r4.1 Table 22 says no iordy on PIO5 and PIO6. */
1998 if (ata_id_is_cfa(adev->id)
1999 && (adev->pio_mode == XFER_PIO_5 || adev->pio_mode == XFER_PIO_6))
2001 /* PIO3 and higher it is mandatory */
2002 if (adev->pio_mode > XFER_PIO_2)
2004 /* We turn it on when possible */
2005 if (ata_id_has_iordy(adev->id))
2011 * ata_pio_mask_no_iordy - Return the non IORDY mask
2014 * Compute the highest mode possible if we are not using iordy. Return
2015 * -1 if no iordy mode is available.
2018 static u32 ata_pio_mask_no_iordy(const struct ata_device *adev)
2020 /* If we have no drive specific rule, then PIO 2 is non IORDY */
2021 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE */
2022 u16 pio = adev->id[ATA_ID_EIDE_PIO];
2023 /* Is the speed faster than the drive allows non IORDY ? */
2025 /* This is cycle times not frequency - watch the logic! */
2026 if (pio > 240) /* PIO2 is 240nS per cycle */
2027 return 3 << ATA_SHIFT_PIO;
2028 return 7 << ATA_SHIFT_PIO;
2031 return 3 << ATA_SHIFT_PIO;
2035 * ata_do_dev_read_id - default ID read method
2037 * @tf: proposed taskfile
2040 * Issue the identify taskfile and hand back the buffer containing
2041 * identify data. For some RAID controllers and for pre ATA devices
2042 * this function is wrapped or replaced by the driver
2044 unsigned int ata_do_dev_read_id(struct ata_device *dev,
2045 struct ata_taskfile *tf, u16 *id)
2047 return ata_exec_internal(dev, tf, NULL, DMA_FROM_DEVICE,
2048 id, sizeof(id[0]) * ATA_ID_WORDS, 0);
2052 * ata_dev_read_id - Read ID data from the specified device
2053 * @dev: target device
2054 * @p_class: pointer to class of the target device (may be changed)
2055 * @flags: ATA_READID_* flags
2056 * @id: buffer to read IDENTIFY data into
2058 * Read ID data from the specified device. ATA_CMD_ID_ATA is
2059 * performed on ATA devices and ATA_CMD_ID_ATAPI on ATAPI
2060 * devices. This function also issues ATA_CMD_INIT_DEV_PARAMS
2061 * for pre-ATA4 drives.
2063 * FIXME: ATA_CMD_ID_ATA is optional for early drives and right
2064 * now we abort if we hit that case.
2067 * Kernel thread context (may sleep)
2070 * 0 on success, -errno otherwise.
2072 int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
2073 unsigned int flags, u16 *id)
2075 struct ata_port *ap = dev->link->ap;
2076 unsigned int class = *p_class;
2077 struct ata_taskfile tf;
2078 unsigned int err_mask = 0;
2080 int may_fallback = 1, tried_spinup = 0;
2083 if (ata_msg_ctl(ap))
2084 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__);
2087 ata_tf_init(dev, &tf);
2091 tf.command = ATA_CMD_ID_ATA;
2094 tf.command = ATA_CMD_ID_ATAPI;
2098 reason = "unsupported class";
2102 tf.protocol = ATA_PROT_PIO;
2104 /* Some devices choke if TF registers contain garbage. Make
2105 * sure those are properly initialized.
2107 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
2109 /* Device presence detection is unreliable on some
2110 * controllers. Always poll IDENTIFY if available.
2112 tf.flags |= ATA_TFLAG_POLLING;
2114 if (ap->ops->read_id)
2115 err_mask = ap->ops->read_id(dev, &tf, id);
2117 err_mask = ata_do_dev_read_id(dev, &tf, id);
2120 if (err_mask & AC_ERR_NODEV_HINT) {
2121 ata_dev_printk(dev, KERN_DEBUG,
2122 "NODEV after polling detection\n");
2126 if ((err_mask == AC_ERR_DEV) && (tf.feature & ATA_ABORTED)) {
2127 /* Device or controller might have reported
2128 * the wrong device class. Give a shot at the
2129 * other IDENTIFY if the current one is
2130 * aborted by the device.
2135 if (class == ATA_DEV_ATA)
2136 class = ATA_DEV_ATAPI;
2138 class = ATA_DEV_ATA;
2142 /* Control reaches here iff the device aborted
2143 * both flavors of IDENTIFYs which happens
2144 * sometimes with phantom devices.
2146 ata_dev_printk(dev, KERN_DEBUG,
2147 "both IDENTIFYs aborted, assuming NODEV\n");
2152 reason = "I/O error";
2156 /* Falling back doesn't make sense if ID data was read
2157 * successfully at least once.
2161 swap_buf_le16(id, ATA_ID_WORDS);
2165 reason = "device reports invalid type";
2167 if (class == ATA_DEV_ATA) {
2168 if (!ata_id_is_ata(id) && !ata_id_is_cfa(id))
2171 if (ata_id_is_ata(id))
2175 if (!tried_spinup && (id[2] == 0x37c8 || id[2] == 0x738c)) {
2178 * Drive powered-up in standby mode, and requires a specific
2179 * SET_FEATURES spin-up subcommand before it will accept
2180 * anything other than the original IDENTIFY command.
2182 err_mask = ata_dev_set_feature(dev, SETFEATURES_SPINUP, 0);
2183 if (err_mask && id[2] != 0x738c) {
2185 reason = "SPINUP failed";
2189 * If the drive initially returned incomplete IDENTIFY info,
2190 * we now must reissue the IDENTIFY command.
2192 if (id[2] == 0x37c8)
2196 if ((flags & ATA_READID_POSTRESET) && class == ATA_DEV_ATA) {
2198 * The exact sequence expected by certain pre-ATA4 drives is:
2200 * IDENTIFY (optional in early ATA)
2201 * INITIALIZE DEVICE PARAMETERS (later IDE and ATA)
2203 * Some drives were very specific about that exact sequence.
2205 * Note that ATA4 says lba is mandatory so the second check
2206 * shoud never trigger.
2208 if (ata_id_major_version(id) < 4 || !ata_id_has_lba(id)) {
2209 err_mask = ata_dev_init_params(dev, id[3], id[6]);
2212 reason = "INIT_DEV_PARAMS failed";
2216 /* current CHS translation info (id[53-58]) might be
2217 * changed. reread the identify device info.
2219 flags &= ~ATA_READID_POSTRESET;
2229 if (ata_msg_warn(ap))
2230 ata_dev_printk(dev, KERN_WARNING, "failed to IDENTIFY "
2231 "(%s, err_mask=0x%x)\n", reason, err_mask);
2235 static inline u8 ata_dev_knobble(struct ata_device *dev)
2237 struct ata_port *ap = dev->link->ap;
2239 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_BRIDGE_OK)
2242 return ((ap->cbl == ATA_CBL_SATA) && (!ata_id_is_sata(dev->id)));
2245 static void ata_dev_config_ncq(struct ata_device *dev,
2246 char *desc, size_t desc_sz)
2248 struct ata_port *ap = dev->link->ap;
2249 int hdepth = 0, ddepth = ata_id_queue_depth(dev->id);
2251 if (!ata_id_has_ncq(dev->id)) {
2255 if (dev->horkage & ATA_HORKAGE_NONCQ) {
2256 snprintf(desc, desc_sz, "NCQ (not used)");
2259 if (ap->flags & ATA_FLAG_NCQ) {
2260 hdepth = min(ap->scsi_host->can_queue, ATA_MAX_QUEUE - 1);
2261 dev->flags |= ATA_DFLAG_NCQ;
2264 if (hdepth >= ddepth)
2265 snprintf(desc, desc_sz, "NCQ (depth %d)", ddepth);
2267 snprintf(desc, desc_sz, "NCQ (depth %d/%d)", hdepth, ddepth);
2271 * ata_dev_configure - Configure the specified ATA/ATAPI device
2272 * @dev: Target device to configure
2274 * Configure @dev according to @dev->id. Generic and low-level
2275 * driver specific fixups are also applied.
2278 * Kernel thread context (may sleep)
2281 * 0 on success, -errno otherwise
2283 int ata_dev_configure(struct ata_device *dev)
2285 struct ata_port *ap = dev->link->ap;
2286 struct ata_eh_context *ehc = &dev->link->eh_context;
2287 int print_info = ehc->i.flags & ATA_EHI_PRINTINFO;
2288 const u16 *id = dev->id;
2289 unsigned long xfer_mask;
2290 char revbuf[7]; /* XYZ-99\0 */
2291 char fwrevbuf[ATA_ID_FW_REV_LEN+1];
2292 char modelbuf[ATA_ID_PROD_LEN+1];
2295 if (!ata_dev_enabled(dev) && ata_msg_info(ap)) {
2296 ata_dev_printk(dev, KERN_INFO, "%s: ENTER/EXIT -- nodev\n",
2301 if (ata_msg_probe(ap))
2302 ata_dev_printk(dev, KERN_DEBUG, "%s: ENTER\n", __func__);
2305 dev->horkage |= ata_dev_blacklisted(dev);
2306 ata_force_horkage(dev);
2308 if (dev->horkage & ATA_HORKAGE_DISABLE) {
2309 ata_dev_printk(dev, KERN_INFO,
2310 "unsupported device, disabling\n");
2311 ata_dev_disable(dev);
2315 if ((!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) &&
2316 dev->class == ATA_DEV_ATAPI) {
2317 ata_dev_printk(dev, KERN_WARNING,
2318 "WARNING: ATAPI is %s, device ignored.\n",
2319 atapi_enabled ? "not supported with this driver"
2321 ata_dev_disable(dev);
2325 /* let ACPI work its magic */
2326 rc = ata_acpi_on_devcfg(dev);
2330 /* massage HPA, do it early as it might change IDENTIFY data */
2331 rc = ata_hpa_resize(dev);
2335 /* print device capabilities */
2336 if (ata_msg_probe(ap))
2337 ata_dev_printk(dev, KERN_DEBUG,
2338 "%s: cfg 49:%04x 82:%04x 83:%04x 84:%04x "
2339 "85:%04x 86:%04x 87:%04x 88:%04x\n",
2341 id[49], id[82], id[83], id[84],
2342 id[85], id[86], id[87], id[88]);
2344 /* initialize to-be-configured parameters */
2345 dev->flags &= ~ATA_DFLAG_CFG_MASK;
2346 dev->max_sectors = 0;
2354 * common ATA, ATAPI feature tests
2357 /* find max transfer mode; for printk only */
2358 xfer_mask = ata_id_xfermask(id);
2360 if (ata_msg_probe(ap))
2363 /* SCSI only uses 4-char revisions, dump full 8 chars from ATA */
2364 ata_id_c_string(dev->id, fwrevbuf, ATA_ID_FW_REV,
2367 ata_id_c_string(dev->id, modelbuf, ATA_ID_PROD,
2370 /* ATA-specific feature tests */
2371 if (dev->class == ATA_DEV_ATA) {
2372 if (ata_id_is_cfa(id)) {
2373 if (id[162] & 1) /* CPRM may make this media unusable */
2374 ata_dev_printk(dev, KERN_WARNING,
2375 "supports DRM functions and may "
2376 "not be fully accessable.\n");
2377 snprintf(revbuf, 7, "CFA");
2379 snprintf(revbuf, 7, "ATA-%d", ata_id_major_version(id));
2380 /* Warn the user if the device has TPM extensions */
2381 if (ata_id_has_tpm(id))
2382 ata_dev_printk(dev, KERN_WARNING,
2383 "supports DRM functions and may "
2384 "not be fully accessable.\n");
2387 dev->n_sectors = ata_id_n_sectors(id);
2389 if (dev->id[59] & 0x100)
2390 dev->multi_count = dev->id[59] & 0xff;
2392 if (ata_id_has_lba(id)) {
2393 const char *lba_desc;
2397 dev->flags |= ATA_DFLAG_LBA;
2398 if (ata_id_has_lba48(id)) {
2399 dev->flags |= ATA_DFLAG_LBA48;
2402 if (dev->n_sectors >= (1UL << 28) &&
2403 ata_id_has_flush_ext(id))
2404 dev->flags |= ATA_DFLAG_FLUSH_EXT;
2408 ata_dev_config_ncq(dev, ncq_desc, sizeof(ncq_desc));
2410 /* print device info to dmesg */
2411 if (ata_msg_drv(ap) && print_info) {
2412 ata_dev_printk(dev, KERN_INFO,
2413 "%s: %s, %s, max %s\n",
2414 revbuf, modelbuf, fwrevbuf,
2415 ata_mode_string(xfer_mask));
2416 ata_dev_printk(dev, KERN_INFO,
2417 "%Lu sectors, multi %u: %s %s\n",
2418 (unsigned long long)dev->n_sectors,
2419 dev->multi_count, lba_desc, ncq_desc);
2424 /* Default translation */
2425 dev->cylinders = id[1];
2427 dev->sectors = id[6];
2429 if (ata_id_current_chs_valid(id)) {
2430 /* Current CHS translation is valid. */
2431 dev->cylinders = id[54];
2432 dev->heads = id[55];
2433 dev->sectors = id[56];
2436 /* print device info to dmesg */
2437 if (ata_msg_drv(ap) && print_info) {
2438 ata_dev_printk(dev, KERN_INFO,
2439 "%s: %s, %s, max %s\n",
2440 revbuf, modelbuf, fwrevbuf,
2441 ata_mode_string(xfer_mask));
2442 ata_dev_printk(dev, KERN_INFO,
2443 "%Lu sectors, multi %u, CHS %u/%u/%u\n",
2444 (unsigned long long)dev->n_sectors,
2445 dev->multi_count, dev->cylinders,
2446 dev->heads, dev->sectors);
2453 /* ATAPI-specific feature tests */
2454 else if (dev->class == ATA_DEV_ATAPI) {
2455 const char *cdb_intr_string = "";
2456 const char *atapi_an_string = "";
2457 const char *dma_dir_string = "";
2460 rc = atapi_cdb_len(id);
2461 if ((rc < 12) || (rc > ATAPI_CDB_LEN)) {
2462 if (ata_msg_warn(ap))
2463 ata_dev_printk(dev, KERN_WARNING,
2464 "unsupported CDB len\n");
2468 dev->cdb_len = (unsigned int) rc;
2470 /* Enable ATAPI AN if both the host and device have
2471 * the support. If PMP is attached, SNTF is required
2472 * to enable ATAPI AN to discern between PHY status
2473 * changed notifications and ATAPI ANs.
2475 if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
2476 (!sata_pmp_attached(ap) ||
2477 sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
2478 unsigned int err_mask;
2480 /* issue SET feature command to turn this on */
2481 err_mask = ata_dev_set_feature(dev,
2482 SETFEATURES_SATA_ENABLE, SATA_AN);
2484 ata_dev_printk(dev, KERN_ERR,
2485 "failed to enable ATAPI AN "
2486 "(err_mask=0x%x)\n", err_mask);
2488 dev->flags |= ATA_DFLAG_AN;
2489 atapi_an_string = ", ATAPI AN";
2493 if (ata_id_cdb_intr(dev->id)) {
2494 dev->flags |= ATA_DFLAG_CDB_INTR;
2495 cdb_intr_string = ", CDB intr";
2498 if (atapi_dmadir || atapi_id_dmadir(dev->id)) {
2499 dev->flags |= ATA_DFLAG_DMADIR;
2500 dma_dir_string = ", DMADIR";
2503 /* print device info to dmesg */
2504 if (ata_msg_drv(ap) && print_info)
2505 ata_dev_printk(dev, KERN_INFO,
2506 "ATAPI: %s, %s, max %s%s%s%s\n",
2508 ata_mode_string(xfer_mask),
2509 cdb_intr_string, atapi_an_string,
2513 /* determine max_sectors */
2514 dev->max_sectors = ATA_MAX_SECTORS;
2515 if (dev->flags & ATA_DFLAG_LBA48)
2516 dev->max_sectors = ATA_MAX_SECTORS_LBA48;
2518 if (!(dev->horkage & ATA_HORKAGE_IPM)) {
2519 if (ata_id_has_hipm(dev->id))
2520 dev->flags |= ATA_DFLAG_HIPM;
2521 if (ata_id_has_dipm(dev->id))
2522 dev->flags |= ATA_DFLAG_DIPM;
2525 /* Limit PATA drive on SATA cable bridge transfers to udma5,
2527 if (ata_dev_knobble(dev)) {
2528 if (ata_msg_drv(ap) && print_info)
2529 ata_dev_printk(dev, KERN_INFO,
2530 "applying bridge limits\n");
2531 dev->udma_mask &= ATA_UDMA5;
2532 dev->max_sectors = ATA_MAX_SECTORS;
2535 if ((dev->class == ATA_DEV_ATAPI) &&
2536 (atapi_command_packet_set(id) == TYPE_TAPE)) {
2537 dev->max_sectors = ATA_MAX_SECTORS_TAPE;
2538 dev->horkage |= ATA_HORKAGE_STUCK_ERR;
2541 if (dev->horkage & ATA_HORKAGE_MAX_SEC_128)
2542 dev->max_sectors = min_t(unsigned int, ATA_MAX_SECTORS_128,
2545 if (ata_dev_blacklisted(dev) & ATA_HORKAGE_IPM) {
2546 dev->horkage |= ATA_HORKAGE_IPM;
2548 /* reset link pm_policy for this port to no pm */
2549 ap->pm_policy = MAX_PERFORMANCE;
2552 if (ap->ops->dev_config)
2553 ap->ops->dev_config(dev);
2555 if (dev->horkage & ATA_HORKAGE_DIAGNOSTIC) {
2556 /* Let the user know. We don't want to disallow opens for
2557 rescue purposes, or in case the vendor is just a blithering
2558 idiot. Do this after the dev_config call as some controllers
2559 with buggy firmware may want to avoid reporting false device
2563 ata_dev_printk(dev, KERN_WARNING,
2564 "Drive reports diagnostics failure. This may indicate a drive\n");
2565 ata_dev_printk(dev, KERN_WARNING,
2566 "fault or invalid emulation. Contact drive vendor for information.\n");
2570 if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
2571 ata_dev_printk(dev, KERN_WARNING, "WARNING: device requires "
2572 "firmware update to be fully functional.\n");
2573 ata_dev_printk(dev, KERN_WARNING, " contact the vendor "
2574 "or visit http://ata.wiki.kernel.org.\n");
2580 if (ata_msg_probe(ap))
2581 ata_dev_printk(dev, KERN_DEBUG,
2582 "%s: EXIT, err\n", __func__);
2587 * ata_cable_40wire - return 40 wire cable type
2590 * Helper method for drivers which want to hardwire 40 wire cable
2594 int ata_cable_40wire(struct ata_port *ap)
2596 return ATA_CBL_PATA40;
2600 * ata_cable_80wire - return 80 wire cable type
2603 * Helper method for drivers which want to hardwire 80 wire cable
2607 int ata_cable_80wire(struct ata_port *ap)
2609 return ATA_CBL_PATA80;
2613 * ata_cable_unknown - return unknown PATA cable.
2616 * Helper method for drivers which have no PATA cable detection.
2619 int ata_cable_unknown(struct ata_port *ap)
2621 return ATA_CBL_PATA_UNK;
2625 * ata_cable_ignore - return ignored PATA cable.
2628 * Helper method for drivers which don't use cable type to limit
2631 int ata_cable_ignore(struct ata_port *ap)
2633 return ATA_CBL_PATA_IGN;
2637 * ata_cable_sata - return SATA cable type
2640 * Helper method for drivers which have SATA cables
2643 int ata_cable_sata(struct ata_port *ap)
2645 return ATA_CBL_SATA;
2649 * ata_bus_probe - Reset and probe ATA bus
2652 * Master ATA bus probing function. Initiates a hardware-dependent
2653 * bus reset, then attempts to identify any devices found on
2657 * PCI/etc. bus probe sem.
2660 * Zero on success, negative errno otherwise.
2663 int ata_bus_probe(struct ata_port *ap)
2665 unsigned int classes[ATA_MAX_DEVICES];
2666 int tries[ATA_MAX_DEVICES];
2668 struct ata_device *dev;
2672 ata_for_each_dev(dev, &ap->link, ALL)
2673 tries[dev->devno] = ATA_PROBE_MAX_TRIES;
2676 ata_for_each_dev(dev, &ap->link, ALL) {
2677 /* If we issue an SRST then an ATA drive (not ATAPI)
2678 * may change configuration and be in PIO0 timing. If
2679 * we do a hard reset (or are coming from power on)
2680 * this is true for ATA or ATAPI. Until we've set a
2681 * suitable controller mode we should not touch the
2682 * bus as we may be talking too fast.
2684 dev->pio_mode = XFER_PIO_0;
2686 /* If the controller has a pio mode setup function
2687 * then use it to set the chipset to rights. Don't
2688 * touch the DMA setup as that will be dealt with when
2689 * configuring devices.
2691 if (ap->ops->set_piomode)
2692 ap->ops->set_piomode(ap, dev);
2695 /* reset and determine device classes */
2696 ap->ops->phy_reset(ap);
2698 ata_for_each_dev(dev, &ap->link, ALL) {
2699 if (!(ap->flags & ATA_FLAG_DISABLED) &&
2700 dev->class != ATA_DEV_UNKNOWN)
2701 classes[dev->devno] = dev->class;
2703 classes[dev->devno] = ATA_DEV_NONE;
2705 dev->class = ATA_DEV_UNKNOWN;
2710 /* read IDENTIFY page and configure devices. We have to do the identify
2711 specific sequence bass-ackwards so that PDIAG- is released by
2714 ata_for_each_dev(dev, &ap->link, ALL_REVERSE) {
2715 if (tries[dev->devno])
2716 dev->class = classes[dev->devno];
2718 if (!ata_dev_enabled(dev))
2721 rc = ata_dev_read_id(dev, &dev->class, ATA_READID_POSTRESET,
2727 /* Now ask for the cable type as PDIAG- should have been released */
2728 if (ap->ops->cable_detect)
2729 ap->cbl = ap->ops->cable_detect(ap);
2731 /* We may have SATA bridge glue hiding here irrespective of
2732 * the reported cable types and sensed types. When SATA
2733 * drives indicate we have a bridge, we don't know which end
2734 * of the link the bridge is which is a problem.
2736 ata_for_each_dev(dev, &ap->link, ENABLED)
2737 if (ata_id_is_sata(dev->id))
2738 ap->cbl = ATA_CBL_SATA;
2740 /* After the identify sequence we can now set up the devices. We do
2741 this in the normal order so that the user doesn't get confused */
2743 ata_for_each_dev(dev, &ap->link, ENABLED) {
2744 ap->link.eh_context.i.flags |= ATA_EHI_PRINTINFO;
2745 rc = ata_dev_configure(dev);
2746 ap->link.eh_context.i.flags &= ~ATA_EHI_PRINTINFO;
2751 /* configure transfer mode */
2752 rc = ata_set_mode(&ap->link, &dev);
2756 ata_for_each_dev(dev, &ap->link, ENABLED)
2759 /* no device present, disable port */
2760 ata_port_disable(ap);
2764 tries[dev->devno]--;
2768 /* eeek, something went very wrong, give up */
2769 tries[dev->devno] = 0;
2773 /* give it just one more chance */
2774 tries[dev->devno] = min(tries[dev->devno], 1);
2776 if (tries[dev->devno] == 1) {
2777 /* This is the last chance, better to slow
2778 * down than lose it.
2780 sata_down_spd_limit(&ap->link, 0);
2781 ata_down_xfermask_limit(dev, ATA_DNXFER_PIO);
2785 if (!tries[dev->devno])
2786 ata_dev_disable(dev);
2792 * ata_port_probe - Mark port as enabled
2793 * @ap: Port for which we indicate enablement
2795 * Modify @ap data structure such that the system
2796 * thinks that the entire port is enabled.
2798 * LOCKING: host lock, or some other form of
2802 void ata_port_probe(struct ata_port *ap)
2804 ap->flags &= ~ATA_FLAG_DISABLED;
2808 * sata_print_link_status - Print SATA link status
2809 * @link: SATA link to printk link status about
2811 * This function prints link speed and status of a SATA link.
2816 static void sata_print_link_status(struct ata_link *link)
2818 u32 sstatus, scontrol, tmp;
2820 if (sata_scr_read(link, SCR_STATUS, &sstatus))
2822 sata_scr_read(link, SCR_CONTROL, &scontrol);
2824 if (ata_phys_link_online(link)) {
2825 tmp = (sstatus >> 4) & 0xf;
2826 ata_link_printk(link, KERN_INFO,
2827 "SATA link up %s (SStatus %X SControl %X)\n",
2828 sata_spd_string(tmp), sstatus, scontrol);
2830 ata_link_printk(link, KERN_INFO,
2831 "SATA link down (SStatus %X SControl %X)\n",
2837 * ata_dev_pair - return other device on cable
2840 * Obtain the other device on the same cable, or if none is
2841 * present NULL is returned
2844 struct ata_device *ata_dev_pair(struct ata_device *adev)
2846 struct ata_link *link = adev->link;
2847 struct ata_device *pair = &link->device[1 - adev->devno];
2848 if (!ata_dev_enabled(pair))
2854 * ata_port_disable - Disable port.
2855 * @ap: Port to be disabled.
2857 * Modify @ap data structure such that the system
2858 * thinks that the entire port is disabled, and should
2859 * never attempt to probe or communicate with devices
2862 * LOCKING: host lock, or some other form of
2866 void ata_port_disable(struct ata_port *ap)
2868 ap->link.device[0].class = ATA_DEV_NONE;
2869 ap->link.device[1].class = ATA_DEV_NONE;
2870 ap->flags |= ATA_FLAG_DISABLED;
2874 * sata_down_spd_limit - adjust SATA spd limit downward
2875 * @link: Link to adjust SATA spd limit for
2876 * @spd_limit: Additional limit
2878 * Adjust SATA spd limit of @link downward. Note that this
2879 * function only adjusts the limit. The change must be applied
2880 * using sata_set_spd().
2882 * If @spd_limit is non-zero, the speed is limited to equal to or
2883 * lower than @spd_limit if such speed is supported. If
2884 * @spd_limit is slower than any supported speed, only the lowest
2885 * supported speed is allowed.
2888 * Inherited from caller.
2891 * 0 on success, negative errno on failure
2893 int sata_down_spd_limit(struct ata_link *link, u32 spd_limit)
2895 u32 sstatus, spd, mask;
2898 if (!sata_scr_valid(link))
2901 /* If SCR can be read, use it to determine the current SPD.
2902 * If not, use cached value in link->sata_spd.
2904 rc = sata_scr_read(link, SCR_STATUS, &sstatus);
2905 if (rc == 0 && ata_sstatus_online(sstatus))
2906 spd = (sstatus >> 4) & 0xf;
2908 spd = link->sata_spd;
2910 mask = link->sata_spd_limit;
2914 /* unconditionally mask off the highest bit */
2915 bit = fls(mask) - 1;
2916 mask &= ~(1 << bit);
2918 /* Mask off all speeds higher than or equal to the current
2919 * one. Force 1.5Gbps if current SPD is not available.
2922 mask &= (1 << (spd - 1)) - 1;
2926 /* were we already at the bottom? */
2931 if (mask & ((1 << spd_limit) - 1))
2932 mask &= (1 << spd_limit) - 1;
2934 bit = ffs(mask) - 1;
2939 link->sata_spd_limit = mask;
2941 ata_link_printk(link, KERN_WARNING, "limiting SATA link speed to %s\n",
2942 sata_spd_string(fls(mask)));
2947 static int __sata_set_spd_needed(struct ata_link *link, u32 *scontrol)
2949 struct ata_link *host_link = &link->ap->link;
2950 u32 limit, target, spd;
2952 limit = link->sata_spd_limit;
2954 /* Don't configure downstream link faster than upstream link.
2955 * It doesn't speed up anything and some PMPs choke on such
2958 if (!ata_is_host_link(link) && host_link->sata_spd)
2959 limit &= (1 << host_link->sata_spd) - 1;
2961 if (limit == UINT_MAX)
2964 target = fls(limit);
2966 spd = (*scontrol >> 4) & 0xf;
2967 *scontrol = (*scontrol & ~0xf0) | ((target & 0xf) << 4);
2969 return spd != target;
2973 * sata_set_spd_needed - is SATA spd configuration needed
2974 * @link: Link in question
2976 * Test whether the spd limit in SControl matches
2977 * @link->sata_spd_limit. This function is used to determine
2978 * whether hardreset is necessary to apply SATA spd
2982 * Inherited from caller.
2985 * 1 if SATA spd configuration is needed, 0 otherwise.
2987 static int sata_set_spd_needed(struct ata_link *link)
2991 if (sata_scr_read(link, SCR_CONTROL, &scontrol))
2994 return __sata_set_spd_needed(link, &scontrol);
2998 * sata_set_spd - set SATA spd according to spd limit
2999 * @link: Link to set SATA spd for
3001 * Set SATA spd of @link according to sata_spd_limit.
3004 * Inherited from caller.
3007 * 0 if spd doesn't need to be changed, 1 if spd has been
3008 * changed. Negative errno if SCR registers are inaccessible.
3010 int sata_set_spd(struct ata_link *link)
3015 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3018 if (!__sata_set_spd_needed(link, &scontrol))
3021 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3028 * This mode timing computation functionality is ported over from
3029 * drivers/ide/ide-timing.h and was originally written by Vojtech Pavlik
3032 * PIO 0-4, MWDMA 0-2 and UDMA 0-6 timings (in nanoseconds).
3033 * These were taken from ATA/ATAPI-6 standard, rev 0a, except
3034 * for UDMA6, which is currently supported only by Maxtor drives.
3036 * For PIO 5/6 MWDMA 3/4 see the CFA specification 3.0.
3039 static const struct ata_timing ata_timing[] = {
3040 /* { XFER_PIO_SLOW, 120, 290, 240, 960, 290, 240, 0, 960, 0 }, */
3041 { XFER_PIO_0, 70, 290, 240, 600, 165, 150, 0, 600, 0 },
3042 { XFER_PIO_1, 50, 290, 93, 383, 125, 100, 0, 383, 0 },
3043 { XFER_PIO_2, 30, 290, 40, 330, 100, 90, 0, 240, 0 },
3044 { XFER_PIO_3, 30, 80, 70, 180, 80, 70, 0, 180, 0 },
3045 { XFER_PIO_4, 25, 70, 25, 120, 70, 25, 0, 120, 0 },
3046 { XFER_PIO_5, 15, 65, 25, 100, 65, 25, 0, 100, 0 },
3047 { XFER_PIO_6, 10, 55, 20, 80, 55, 20, 0, 80, 0 },
3049 { XFER_SW_DMA_0, 120, 0, 0, 0, 480, 480, 50, 960, 0 },
3050 { XFER_SW_DMA_1, 90, 0, 0, 0, 240, 240, 30, 480, 0 },
3051 { XFER_SW_DMA_2, 60, 0, 0, 0, 120, 120, 20, 240, 0 },
3053 { XFER_MW_DMA_0, 60, 0, 0, 0, 215, 215, 20, 480, 0 },
3054 { XFER_MW_DMA_1, 45, 0, 0, 0, 80, 50, 5, 150, 0 },
3055 { XFER_MW_DMA_2, 25, 0, 0, 0, 70, 25, 5, 120, 0 },
3056 { XFER_MW_DMA_3, 25, 0, 0, 0, 65, 25, 5, 100, 0 },
3057 { XFER_MW_DMA_4, 25, 0, 0, 0, 55, 20, 5, 80, 0 },
3059 /* { XFER_UDMA_SLOW, 0, 0, 0, 0, 0, 0, 0, 0, 150 }, */
3060 { XFER_UDMA_0, 0, 0, 0, 0, 0, 0, 0, 0, 120 },
3061 { XFER_UDMA_1, 0, 0, 0, 0, 0, 0, 0, 0, 80 },
3062 { XFER_UDMA_2, 0, 0, 0, 0, 0, 0, 0, 0, 60 },
3063 { XFER_UDMA_3, 0, 0, 0, 0, 0, 0, 0, 0, 45 },
3064 { XFER_UDMA_4, 0, 0, 0, 0, 0, 0, 0, 0, 30 },
3065 { XFER_UDMA_5, 0, 0, 0, 0, 0, 0, 0, 0, 20 },
3066 { XFER_UDMA_6, 0, 0, 0, 0, 0, 0, 0, 0, 15 },
3071 #define ENOUGH(v, unit) (((v)-1)/(unit)+1)
3072 #define EZ(v, unit) ((v)?ENOUGH(v, unit):0)
3074 static void ata_timing_quantize(const struct ata_timing *t, struct ata_timing *q, int T, int UT)
3076 q->setup = EZ(t->setup * 1000, T);
3077 q->act8b = EZ(t->act8b * 1000, T);
3078 q->rec8b = EZ(t->rec8b * 1000, T);
3079 q->cyc8b = EZ(t->cyc8b * 1000, T);
3080 q->active = EZ(t->active * 1000, T);
3081 q->recover = EZ(t->recover * 1000, T);
3082 q->dmack_hold = EZ(t->dmack_hold * 1000, T);
3083 q->cycle = EZ(t->cycle * 1000, T);
3084 q->udma = EZ(t->udma * 1000, UT);
3087 void ata_timing_merge(const struct ata_timing *a, const struct ata_timing *b,
3088 struct ata_timing *m, unsigned int what)
3090 if (what & ATA_TIMING_SETUP ) m->setup = max(a->setup, b->setup);
3091 if (what & ATA_TIMING_ACT8B ) m->act8b = max(a->act8b, b->act8b);
3092 if (what & ATA_TIMING_REC8B ) m->rec8b = max(a->rec8b, b->rec8b);
3093 if (what & ATA_TIMING_CYC8B ) m->cyc8b = max(a->cyc8b, b->cyc8b);
3094 if (what & ATA_TIMING_ACTIVE ) m->active = max(a->active, b->active);
3095 if (what & ATA_TIMING_RECOVER) m->recover = max(a->recover, b->recover);
3096 if (what & ATA_TIMING_DMACK_HOLD) m->dmack_hold = max(a->dmack_hold, b->dmack_hold);
3097 if (what & ATA_TIMING_CYCLE ) m->cycle = max(a->cycle, b->cycle);
3098 if (what & ATA_TIMING_UDMA ) m->udma = max(a->udma, b->udma);
3101 const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
3103 const struct ata_timing *t = ata_timing;
3105 while (xfer_mode > t->mode)
3108 if (xfer_mode == t->mode)
3113 int ata_timing_compute(struct ata_device *adev, unsigned short speed,
3114 struct ata_timing *t, int T, int UT)
3116 const struct ata_timing *s;
3117 struct ata_timing p;
3123 if (!(s = ata_timing_find_mode(speed)))
3126 memcpy(t, s, sizeof(*s));
3129 * If the drive is an EIDE drive, it can tell us it needs extended
3130 * PIO/MW_DMA cycle timing.
3133 if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
3134 memset(&p, 0, sizeof(p));
3135 if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
3136 if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
3137 else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
3138 } else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
3139 p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
3141 ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
3145 * Convert the timing to bus clock counts.
3148 ata_timing_quantize(t, t, T, UT);
3151 * Even in DMA/UDMA modes we still use PIO access for IDENTIFY,
3152 * S.M.A.R.T * and some other commands. We have to ensure that the
3153 * DMA cycle timing is slower/equal than the fastest PIO timing.
3156 if (speed > XFER_PIO_6) {
3157 ata_timing_compute(adev, adev->pio_mode, &p, T, UT);
3158 ata_timing_merge(&p, t, t, ATA_TIMING_ALL);
3162 * Lengthen active & recovery time so that cycle time is correct.
3165 if (t->act8b + t->rec8b < t->cyc8b) {
3166 t->act8b += (t->cyc8b - (t->act8b + t->rec8b)) / 2;
3167 t->rec8b = t->cyc8b - t->act8b;
3170 if (t->active + t->recover < t->cycle) {
3171 t->active += (t->cycle - (t->active + t->recover)) / 2;
3172 t->recover = t->cycle - t->active;
3175 /* In a few cases quantisation may produce enough errors to
3176 leave t->cycle too low for the sum of active and recovery
3177 if so we must correct this */
3178 if (t->active + t->recover > t->cycle)
3179 t->cycle = t->active + t->recover;
3185 * ata_timing_cycle2mode - find xfer mode for the specified cycle duration
3186 * @xfer_shift: ATA_SHIFT_* value for transfer type to examine.
3187 * @cycle: cycle duration in ns
3189 * Return matching xfer mode for @cycle. The returned mode is of
3190 * the transfer type specified by @xfer_shift. If @cycle is too
3191 * slow for @xfer_shift, 0xff is returned. If @cycle is faster
3192 * than the fastest known mode, the fasted mode is returned.
3198 * Matching xfer_mode, 0xff if no match found.
3200 u8 ata_timing_cycle2mode(unsigned int xfer_shift, int cycle)
3202 u8 base_mode = 0xff, last_mode = 0xff;
3203 const struct ata_xfer_ent *ent;
3204 const struct ata_timing *t;
3206 for (ent = ata_xfer_tbl; ent->shift >= 0; ent++)
3207 if (ent->shift == xfer_shift)
3208 base_mode = ent->base;
3210 for (t = ata_timing_find_mode(base_mode);
3211 t && ata_xfer_mode2shift(t->mode) == xfer_shift; t++) {
3212 unsigned short this_cycle;
3214 switch (xfer_shift) {
3216 case ATA_SHIFT_MWDMA:
3217 this_cycle = t->cycle;
3219 case ATA_SHIFT_UDMA:
3220 this_cycle = t->udma;
3226 if (cycle > this_cycle)
3229 last_mode = t->mode;
3236 * ata_down_xfermask_limit - adjust dev xfer masks downward
3237 * @dev: Device to adjust xfer masks
3238 * @sel: ATA_DNXFER_* selector
3240 * Adjust xfer masks of @dev downward. Note that this function
3241 * does not apply the change. Invoking ata_set_mode() afterwards
3242 * will apply the limit.
3245 * Inherited from caller.
3248 * 0 on success, negative errno on failure
3250 int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
3253 unsigned long orig_mask, xfer_mask;
3254 unsigned long pio_mask, mwdma_mask, udma_mask;
3257 quiet = !!(sel & ATA_DNXFER_QUIET);
3258 sel &= ~ATA_DNXFER_QUIET;
3260 xfer_mask = orig_mask = ata_pack_xfermask(dev->pio_mask,
3263 ata_unpack_xfermask(xfer_mask, &pio_mask, &mwdma_mask, &udma_mask);
3266 case ATA_DNXFER_PIO:
3267 highbit = fls(pio_mask) - 1;
3268 pio_mask &= ~(1 << highbit);
3271 case ATA_DNXFER_DMA:
3273 highbit = fls(udma_mask) - 1;
3274 udma_mask &= ~(1 << highbit);
3277 } else if (mwdma_mask) {
3278 highbit = fls(mwdma_mask) - 1;
3279 mwdma_mask &= ~(1 << highbit);
3285 case ATA_DNXFER_40C:
3286 udma_mask &= ATA_UDMA_MASK_40C;
3289 case ATA_DNXFER_FORCE_PIO0:
3291 case ATA_DNXFER_FORCE_PIO:
3300 xfer_mask &= ata_pack_xfermask(pio_mask, mwdma_mask, udma_mask);
3302 if (!(xfer_mask & ATA_MASK_PIO) || xfer_mask == orig_mask)
3306 if (xfer_mask & (ATA_MASK_MWDMA | ATA_MASK_UDMA))
3307 snprintf(buf, sizeof(buf), "%s:%s",
3308 ata_mode_string(xfer_mask),
3309 ata_mode_string(xfer_mask & ATA_MASK_PIO));
3311 snprintf(buf, sizeof(buf), "%s",
3312 ata_mode_string(xfer_mask));
3314 ata_dev_printk(dev, KERN_WARNING,
3315 "limiting speed to %s\n", buf);
3318 ata_unpack_xfermask(xfer_mask, &dev->pio_mask, &dev->mwdma_mask,
3324 static int ata_dev_set_mode(struct ata_device *dev)
3326 struct ata_eh_context *ehc = &dev->link->eh_context;
3327 const char *dev_err_whine = "";
3328 int ign_dev_err = 0;
3329 unsigned int err_mask;
3332 dev->flags &= ~ATA_DFLAG_PIO;
3333 if (dev->xfer_shift == ATA_SHIFT_PIO)
3334 dev->flags |= ATA_DFLAG_PIO;
3336 err_mask = ata_dev_set_xfermode(dev);
3338 if (err_mask & ~AC_ERR_DEV)
3342 ehc->i.flags |= ATA_EHI_POST_SETMODE;
3343 rc = ata_dev_revalidate(dev, ATA_DEV_UNKNOWN, 0);
3344 ehc->i.flags &= ~ATA_EHI_POST_SETMODE;
3348 if (dev->xfer_shift == ATA_SHIFT_PIO) {
3349 /* Old CFA may refuse this command, which is just fine */
3350 if (ata_id_is_cfa(dev->id))
3352 /* Catch several broken garbage emulations plus some pre
3354 if (ata_id_major_version(dev->id) == 0 &&
3355 dev->pio_mode <= XFER_PIO_2)
3357 /* Some very old devices and some bad newer ones fail
3358 any kind of SET_XFERMODE request but support PIO0-2
3359 timings and no IORDY */
3360 if (!ata_id_has_iordy(dev->id) && dev->pio_mode <= XFER_PIO_2)
3363 /* Early MWDMA devices do DMA but don't allow DMA mode setting.
3364 Don't fail an MWDMA0 set IFF the device indicates it is in MWDMA0 */
3365 if (dev->xfer_shift == ATA_SHIFT_MWDMA &&
3366 dev->dma_mode == XFER_MW_DMA_0 &&
3367 (dev->id[63] >> 8) & 1)
3370 /* if the device is actually configured correctly, ignore dev err */
3371 if (dev->xfer_mode == ata_xfer_mask2mode(ata_id_xfermask(dev->id)))
3374 if (err_mask & AC_ERR_DEV) {
3378 dev_err_whine = " (device error ignored)";
3381 DPRINTK("xfer_shift=%u, xfer_mode=0x%x\n",
3382 dev->xfer_shift, (int)dev->xfer_mode);
3384 ata_dev_printk(dev, KERN_INFO, "configured for %s%s\n",
3385 ata_mode_string(ata_xfer_mode2mask(dev->xfer_mode)),
3391 ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
3392 "(err_mask=0x%x)\n", err_mask);
3397 * ata_do_set_mode - Program timings and issue SET FEATURES - XFER
3398 * @link: link on which timings will be programmed
3399 * @r_failed_dev: out parameter for failed device
3401 * Standard implementation of the function used to tune and set
3402 * ATA device disk transfer mode (PIO3, UDMA6, etc.). If
3403 * ata_dev_set_mode() fails, pointer to the failing device is
3404 * returned in @r_failed_dev.
3407 * PCI/etc. bus probe sem.
3410 * 0 on success, negative errno otherwise
3413 int ata_do_set_mode(struct ata_link *link, struct ata_device **r_failed_dev)
3415 struct ata_port *ap = link->ap;
3416 struct ata_device *dev;
3417 int rc = 0, used_dma = 0, found = 0;
3419 /* step 1: calculate xfer_mask */
3420 ata_for_each_dev(dev, link, ENABLED) {
3421 unsigned long pio_mask, dma_mask;
3422 unsigned int mode_mask;
3424 mode_mask = ATA_DMA_MASK_ATA;
3425 if (dev->class == ATA_DEV_ATAPI)
3426 mode_mask = ATA_DMA_MASK_ATAPI;
3427 else if (ata_id_is_cfa(dev->id))
3428 mode_mask = ATA_DMA_MASK_CFA;
3430 ata_dev_xfermask(dev);
3431 ata_force_xfermask(dev);
3433 pio_mask = ata_pack_xfermask(dev->pio_mask, 0, 0);
3434 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3436 if (libata_dma_mask & mode_mask)
3437 dma_mask = ata_pack_xfermask(0, dev->mwdma_mask, dev->udma_mask);
3441 dev->pio_mode = ata_xfer_mask2mode(pio_mask);
3442 dev->dma_mode = ata_xfer_mask2mode(dma_mask);
3445 if (ata_dma_enabled(dev))
3451 /* step 2: always set host PIO timings */
3452 ata_for_each_dev(dev, link, ENABLED) {
3453 if (dev->pio_mode == 0xff) {
3454 ata_dev_printk(dev, KERN_WARNING, "no PIO support\n");
3459 dev->xfer_mode = dev->pio_mode;
3460 dev->xfer_shift = ATA_SHIFT_PIO;
3461 if (ap->ops->set_piomode)
3462 ap->ops->set_piomode(ap, dev);
3465 /* step 3: set host DMA timings */
3466 ata_for_each_dev(dev, link, ENABLED) {
3467 if (!ata_dma_enabled(dev))
3470 dev->xfer_mode = dev->dma_mode;
3471 dev->xfer_shift = ata_xfer_mode2shift(dev->dma_mode);
3472 if (ap->ops->set_dmamode)
3473 ap->ops->set_dmamode(ap, dev);
3476 /* step 4: update devices' xfer mode */
3477 ata_for_each_dev(dev, link, ENABLED) {
3478 rc = ata_dev_set_mode(dev);
3483 /* Record simplex status. If we selected DMA then the other
3484 * host channels are not permitted to do so.
3486 if (used_dma && (ap->host->flags & ATA_HOST_SIMPLEX))
3487 ap->host->simplex_claimed = ap;
3491 *r_failed_dev = dev;
3496 * ata_wait_ready - wait for link to become ready
3497 * @link: link to be waited on
3498 * @deadline: deadline jiffies for the operation
3499 * @check_ready: callback to check link readiness
3501 * Wait for @link to become ready. @check_ready should return
3502 * positive number if @link is ready, 0 if it isn't, -ENODEV if
3503 * link doesn't seem to be occupied, other errno for other error
3506 * Transient -ENODEV conditions are allowed for
3507 * ATA_TMOUT_FF_WAIT.
3513 * 0 if @linke is ready before @deadline; otherwise, -errno.
3515 int ata_wait_ready(struct ata_link *link, unsigned long deadline,
3516 int (*check_ready)(struct ata_link *link))
3518 unsigned long start = jiffies;
3519 unsigned long nodev_deadline = ata_deadline(start, ATA_TMOUT_FF_WAIT);
3522 /* Slave readiness can't be tested separately from master. On
3523 * M/S emulation configuration, this function should be called
3524 * only on the master and it will handle both master and slave.
3526 WARN_ON(link == link->ap->slave_link);
3528 if (time_after(nodev_deadline, deadline))
3529 nodev_deadline = deadline;
3532 unsigned long now = jiffies;
3535 ready = tmp = check_ready(link);
3539 /* -ENODEV could be transient. Ignore -ENODEV if link
3540 * is online. Also, some SATA devices take a long
3541 * time to clear 0xff after reset. For example,
3542 * HHD424020F7SV00 iVDR needs >= 800ms while Quantum
3543 * GoVault needs even more than that. Wait for
3544 * ATA_TMOUT_FF_WAIT on -ENODEV if link isn't offline.
3546 * Note that some PATA controllers (pata_ali) explode
3547 * if status register is read more than once when
3548 * there's no device attached.
3550 if (ready == -ENODEV) {
3551 if (ata_link_online(link))
3553 else if ((link->ap->flags & ATA_FLAG_SATA) &&
3554 !ata_link_offline(link) &&
3555 time_before(now, nodev_deadline))
3561 if (time_after(now, deadline))
3564 if (!warned && time_after(now, start + 5 * HZ) &&
3565 (deadline - now > 3 * HZ)) {
3566 ata_link_printk(link, KERN_WARNING,
3567 "link is slow to respond, please be patient "
3568 "(ready=%d)\n", tmp);
3577 * ata_wait_after_reset - wait for link to become ready after reset
3578 * @link: link to be waited on
3579 * @deadline: deadline jiffies for the operation
3580 * @check_ready: callback to check link readiness
3582 * Wait for @link to become ready after reset.
3588 * 0 if @linke is ready before @deadline; otherwise, -errno.
3590 int ata_wait_after_reset(struct ata_link *link, unsigned long deadline,
3591 int (*check_ready)(struct ata_link *link))
3593 msleep(ATA_WAIT_AFTER_RESET);
3595 return ata_wait_ready(link, deadline, check_ready);
3599 * sata_link_debounce - debounce SATA phy status
3600 * @link: ATA link to debounce SATA phy status for
3601 * @params: timing parameters { interval, duratinon, timeout } in msec
3602 * @deadline: deadline jiffies for the operation
3604 * Make sure SStatus of @link reaches stable state, determined by
3605 * holding the same value where DET is not 1 for @duration polled
3606 * every @interval, before @timeout. Timeout constraints the
3607 * beginning of the stable state. Because DET gets stuck at 1 on
3608 * some controllers after hot unplugging, this functions waits
3609 * until timeout then returns 0 if DET is stable at 1.
3611 * @timeout is further limited by @deadline. The sooner of the
3615 * Kernel thread context (may sleep)
3618 * 0 on success, -errno on failure.
3620 int sata_link_debounce(struct ata_link *link, const unsigned long *params,
3621 unsigned long deadline)
3623 unsigned long interval = params[0];
3624 unsigned long duration = params[1];
3625 unsigned long last_jiffies, t;
3629 t = ata_deadline(jiffies, params[2]);
3630 if (time_before(t, deadline))
3633 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3638 last_jiffies = jiffies;
3642 if ((rc = sata_scr_read(link, SCR_STATUS, &cur)))
3648 if (cur == 1 && time_before(jiffies, deadline))
3650 if (time_after(jiffies,
3651 ata_deadline(last_jiffies, duration)))
3656 /* unstable, start over */
3658 last_jiffies = jiffies;
3660 /* Check deadline. If debouncing failed, return
3661 * -EPIPE to tell upper layer to lower link speed.
3663 if (time_after(jiffies, deadline))
3669 * sata_link_resume - resume SATA link
3670 * @link: ATA link to resume SATA
3671 * @params: timing parameters { interval, duratinon, timeout } in msec
3672 * @deadline: deadline jiffies for the operation
3674 * Resume SATA phy @link and debounce it.
3677 * Kernel thread context (may sleep)
3680 * 0 on success, -errno on failure.
3682 int sata_link_resume(struct ata_link *link, const unsigned long *params,
3683 unsigned long deadline)
3685 u32 scontrol, serror;
3688 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3691 scontrol = (scontrol & 0x0f0) | 0x300;
3693 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3696 /* Some PHYs react badly if SStatus is pounded immediately
3697 * after resuming. Delay 200ms before debouncing.
3701 if ((rc = sata_link_debounce(link, params, deadline)))
3704 /* clear SError, some PHYs require this even for SRST to work */
3705 if (!(rc = sata_scr_read(link, SCR_ERROR, &serror)))
3706 rc = sata_scr_write(link, SCR_ERROR, serror);
3708 return rc != -EINVAL ? rc : 0;
3712 * ata_std_prereset - prepare for reset
3713 * @link: ATA link to be reset
3714 * @deadline: deadline jiffies for the operation
3716 * @link is about to be reset. Initialize it. Failure from
3717 * prereset makes libata abort whole reset sequence and give up
3718 * that port, so prereset should be best-effort. It does its
3719 * best to prepare for reset sequence but if things go wrong, it
3720 * should just whine, not fail.
3723 * Kernel thread context (may sleep)
3726 * 0 on success, -errno otherwise.
3728 int ata_std_prereset(struct ata_link *link, unsigned long deadline)
3730 struct ata_port *ap = link->ap;
3731 struct ata_eh_context *ehc = &link->eh_context;
3732 const unsigned long *timing = sata_ehc_deb_timing(ehc);
3735 /* if we're about to do hardreset, nothing more to do */
3736 if (ehc->i.action & ATA_EH_HARDRESET)
3739 /* if SATA, resume link */
3740 if (ap->flags & ATA_FLAG_SATA) {
3741 rc = sata_link_resume(link, timing, deadline);
3742 /* whine about phy resume failure but proceed */
3743 if (rc && rc != -EOPNOTSUPP)
3744 ata_link_printk(link, KERN_WARNING, "failed to resume "
3745 "link for reset (errno=%d)\n", rc);
3748 /* no point in trying softreset on offline link */
3749 if (ata_phys_link_offline(link))
3750 ehc->i.action &= ~ATA_EH_SOFTRESET;
3756 * sata_link_hardreset - reset link via SATA phy reset
3757 * @link: link to reset
3758 * @timing: timing parameters { interval, duratinon, timeout } in msec
3759 * @deadline: deadline jiffies for the operation
3760 * @online: optional out parameter indicating link onlineness
3761 * @check_ready: optional callback to check link readiness
3763 * SATA phy-reset @link using DET bits of SControl register.
3764 * After hardreset, link readiness is waited upon using
3765 * ata_wait_ready() if @check_ready is specified. LLDs are
3766 * allowed to not specify @check_ready and wait itself after this
3767 * function returns. Device classification is LLD's
3770 * *@online is set to one iff reset succeeded and @link is online
3774 * Kernel thread context (may sleep)
3777 * 0 on success, -errno otherwise.
3779 int sata_link_hardreset(struct ata_link *link, const unsigned long *timing,
3780 unsigned long deadline,
3781 bool *online, int (*check_ready)(struct ata_link *))
3791 if (sata_set_spd_needed(link)) {
3792 /* SATA spec says nothing about how to reconfigure
3793 * spd. To be on the safe side, turn off phy during
3794 * reconfiguration. This works for at least ICH7 AHCI
3797 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3800 scontrol = (scontrol & 0x0f0) | 0x304;
3802 if ((rc = sata_scr_write(link, SCR_CONTROL, scontrol)))
3808 /* issue phy wake/reset */
3809 if ((rc = sata_scr_read(link, SCR_CONTROL, &scontrol)))
3812 scontrol = (scontrol & 0x0f0) | 0x301;
3814 if ((rc = sata_scr_write_flush(link, SCR_CONTROL, scontrol)))
3817 /* Couldn't find anything in SATA I/II specs, but AHCI-1.1
3818 * 10.4.2 says at least 1 ms.
3822 /* bring link back */
3823 rc = sata_link_resume(link, timing, deadline);
3826 /* if link is offline nothing more to do */
3827 if (ata_phys_link_offline(link))
3830 /* Link is online. From this point, -ENODEV too is an error. */
3834 if (sata_pmp_supported(link->ap) && ata_is_host_link(link)) {
3835 /* If PMP is supported, we have to do follow-up SRST.
3836 * Some PMPs don't send D2H Reg FIS after hardreset if
3837 * the first port is empty. Wait only for
3838 * ATA_TMOUT_PMP_SRST_WAIT.
3841 unsigned long pmp_deadline;
3843 pmp_deadline = ata_deadline(jiffies,
3844 ATA_TMOUT_PMP_SRST_WAIT);
3845 if (time_after(pmp_deadline, deadline))
3846 pmp_deadline = deadline;
3847 ata_wait_ready(link, pmp_deadline, check_ready);
3855 rc = ata_wait_ready(link, deadline, check_ready);
3857 if (rc && rc != -EAGAIN) {
3858 /* online is set iff link is online && reset succeeded */
3861 ata_link_printk(link, KERN_ERR,
3862 "COMRESET failed (errno=%d)\n", rc);
3864 DPRINTK("EXIT, rc=%d\n", rc);
3869 * sata_std_hardreset - COMRESET w/o waiting or classification
3870 * @link: link to reset
3871 * @class: resulting class of attached device
3872 * @deadline: deadline jiffies for the operation
3874 * Standard SATA COMRESET w/o waiting or classification.
3877 * Kernel thread context (may sleep)
3880 * 0 if link offline, -EAGAIN if link online, -errno on errors.
3882 int sata_std_hardreset(struct ata_link *link, unsigned int *class,
3883 unsigned long deadline)
3885 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
3890 rc = sata_link_hardreset(link, timing, deadline, &online, NULL);
3891 return online ? -EAGAIN : rc;
3895 * ata_std_postreset - standard postreset callback
3896 * @link: the target ata_link
3897 * @classes: classes of attached devices
3899 * This function is invoked after a successful reset. Note that
3900 * the device might have been reset more than once using
3901 * different reset methods before postreset is invoked.
3904 * Kernel thread context (may sleep)
3906 void ata_std_postreset(struct ata_link *link, unsigned int *classes)
3912 /* reset complete, clear SError */
3913 if (!sata_scr_read(link, SCR_ERROR, &serror))
3914 sata_scr_write(link, SCR_ERROR, serror);
3916 /* print link status */
3917 sata_print_link_status(link);
3923 * ata_dev_same_device - Determine whether new ID matches configured device
3924 * @dev: device to compare against
3925 * @new_class: class of the new device
3926 * @new_id: IDENTIFY page of the new device
3928 * Compare @new_class and @new_id against @dev and determine
3929 * whether @dev is the device indicated by @new_class and
3936 * 1 if @dev matches @new_class and @new_id, 0 otherwise.
3938 static int ata_dev_same_device(struct ata_device *dev, unsigned int new_class,
3941 const u16 *old_id = dev->id;
3942 unsigned char model[2][ATA_ID_PROD_LEN + 1];
3943 unsigned char serial[2][ATA_ID_SERNO_LEN + 1];
3945 if (dev->class != new_class) {
3946 ata_dev_printk(dev, KERN_INFO, "class mismatch %d != %d\n",
3947 dev->class, new_class);
3951 ata_id_c_string(old_id, model[0], ATA_ID_PROD, sizeof(model[0]));
3952 ata_id_c_string(new_id, model[1], ATA_ID_PROD, sizeof(model[1]));
3953 ata_id_c_string(old_id, serial[0], ATA_ID_SERNO, sizeof(serial[0]));
3954 ata_id_c_string(new_id, serial[1], ATA_ID_SERNO, sizeof(serial[1]));
3956 if (strcmp(model[0], model[1])) {
3957 ata_dev_printk(dev, KERN_INFO, "model number mismatch "
3958 "'%s' != '%s'\n", model[0], model[1]);
3962 if (strcmp(serial[0], serial[1])) {
3963 ata_dev_printk(dev, KERN_INFO, "serial number mismatch "
3964 "'%s' != '%s'\n", serial[0], serial[1]);
3972 * ata_dev_reread_id - Re-read IDENTIFY data
3973 * @dev: target ATA device
3974 * @readid_flags: read ID flags
3976 * Re-read IDENTIFY page and make sure @dev is still attached to
3980 * Kernel thread context (may sleep)
3983 * 0 on success, negative errno otherwise
3985 int ata_dev_reread_id(struct ata_device *dev, unsigned int readid_flags)
3987 unsigned int class = dev->class;
3988 u16 *id = (void *)dev->link->ap->sector_buf;
3992 rc = ata_dev_read_id(dev, &class, readid_flags, id);
3996 /* is the device still there? */
3997 if (!ata_dev_same_device(dev, class, id))
4000 memcpy(dev->id, id, sizeof(id[0]) * ATA_ID_WORDS);
4005 * ata_dev_revalidate - Revalidate ATA device
4006 * @dev: device to revalidate
4007 * @new_class: new class code
4008 * @readid_flags: read ID flags
4010 * Re-read IDENTIFY page, make sure @dev is still attached to the
4011 * port and reconfigure it according to the new IDENTIFY page.
4014 * Kernel thread context (may sleep)
4017 * 0 on success, negative errno otherwise
4019 int ata_dev_revalidate(struct ata_device *dev, unsigned int new_class,
4020 unsigned int readid_flags)
4022 u64 n_sectors = dev->n_sectors;
4025 if (!ata_dev_enabled(dev))
4028 /* fail early if !ATA && !ATAPI to avoid issuing [P]IDENTIFY to PMP */
4029 if (ata_class_enabled(new_class) &&
4030 new_class != ATA_DEV_ATA && new_class != ATA_DEV_ATAPI) {
4031 ata_dev_printk(dev, KERN_INFO, "class mismatch %u != %u\n",
4032 dev->class, new_class);
4038 rc = ata_dev_reread_id(dev, readid_flags);
4042 /* configure device according to the new ID */
4043 rc = ata_dev_configure(dev);
4047 /* verify n_sectors hasn't changed */
4048 if (dev->class == ATA_DEV_ATA && n_sectors &&
4049 dev->n_sectors != n_sectors) {
4050 ata_dev_printk(dev, KERN_INFO, "n_sectors mismatch "
4052 (unsigned long long)n_sectors,
4053 (unsigned long long)dev->n_sectors);
4055 /* restore original n_sectors */
4056 dev->n_sectors = n_sectors;
4065 ata_dev_printk(dev, KERN_ERR, "revalidation failed (errno=%d)\n", rc);
4069 struct ata_blacklist_entry {
4070 const char *model_num;
4071 const char *model_rev;
4072 unsigned long horkage;
4075 static const struct ata_blacklist_entry ata_device_blacklist [] = {
4076 /* Devices with DMA related problems under Linux */
4077 { "WDC AC11000H", NULL, ATA_HORKAGE_NODMA },
4078 { "WDC AC22100H", NULL, ATA_HORKAGE_NODMA },
4079 { "WDC AC32500H", NULL, ATA_HORKAGE_NODMA },
4080 { "WDC AC33100H", NULL, ATA_HORKAGE_NODMA },
4081 { "WDC AC31600H", NULL, ATA_HORKAGE_NODMA },
4082 { "WDC AC32100H", "24.09P07", ATA_HORKAGE_NODMA },
4083 { "WDC AC23200L", "21.10N21", ATA_HORKAGE_NODMA },
4084 { "Compaq CRD-8241B", NULL, ATA_HORKAGE_NODMA },
4085 { "CRD-8400B", NULL, ATA_HORKAGE_NODMA },
4086 { "CRD-8480B", NULL, ATA_HORKAGE_NODMA },
4087 { "CRD-8482B", NULL, ATA_HORKAGE_NODMA },
4088 { "CRD-84", NULL, ATA_HORKAGE_NODMA },
4089 { "SanDisk SDP3B", NULL, ATA_HORKAGE_NODMA },
4090 { "SanDisk SDP3B-64", NULL, ATA_HORKAGE_NODMA },
4091 { "SANYO CD-ROM CRD", NULL, ATA_HORKAGE_NODMA },
4092 { "HITACHI CDR-8", NULL, ATA_HORKAGE_NODMA },
4093 { "HITACHI CDR-8335", NULL, ATA_HORKAGE_NODMA },
4094 { "HITACHI CDR-8435", NULL, ATA_HORKAGE_NODMA },
4095 { "Toshiba CD-ROM XM-6202B", NULL, ATA_HORKAGE_NODMA },
4096 { "TOSHIBA CD-ROM XM-1702BC", NULL, ATA_HORKAGE_NODMA },
4097 { "CD-532E-A", NULL, ATA_HORKAGE_NODMA },
4098 { "E-IDE CD-ROM CR-840",NULL, ATA_HORKAGE_NODMA },
4099 { "CD-ROM Drive/F5A", NULL, ATA_HORKAGE_NODMA },
4100 { "WPI CDD-820", NULL, ATA_HORKAGE_NODMA },
4101 { "SAMSUNG CD-ROM SC-148C", NULL, ATA_HORKAGE_NODMA },
4102 { "SAMSUNG CD-ROM SC", NULL, ATA_HORKAGE_NODMA },
4103 { "ATAPI CD-ROM DRIVE 40X MAXIMUM",NULL,ATA_HORKAGE_NODMA },
4104 { "_NEC DV5800A", NULL, ATA_HORKAGE_NODMA },
4105 { "SAMSUNG CD-ROM SN-124", "N001", ATA_HORKAGE_NODMA },
4106 { "Seagate STT20000A", NULL, ATA_HORKAGE_NODMA },
4107 /* Odd clown on sil3726/4726 PMPs */
4108 { "Config Disk", NULL, ATA_HORKAGE_DISABLE },
4110 /* Weird ATAPI devices */
4111 { "TORiSAN DVD-ROM DRD-N216", NULL, ATA_HORKAGE_MAX_SEC_128 },
4112 { "QUANTUM DAT DAT72-000", NULL, ATA_HORKAGE_ATAPI_MOD16_DMA },
4114 /* Devices we expect to fail diagnostics */
4116 /* Devices where NCQ should be avoided */
4118 { "WDC WD740ADFD-00", NULL, ATA_HORKAGE_NONCQ },
4119 { "WDC WD740ADFD-00NLR1", NULL, ATA_HORKAGE_NONCQ, },
4120 /* http://thread.gmane.org/gmane.linux.ide/14907 */
4121 { "FUJITSU MHT2060BH", NULL, ATA_HORKAGE_NONCQ },
4123 { "Maxtor *", "BANC*", ATA_HORKAGE_NONCQ },
4124 { "Maxtor 7V300F0", "VA111630", ATA_HORKAGE_NONCQ },
4125 { "ST380817AS", "3.42", ATA_HORKAGE_NONCQ },
4126 { "ST3160023AS", "3.42", ATA_HORKAGE_NONCQ },
4127 { "OCZ CORE_SSD", "02.10104", ATA_HORKAGE_NONCQ },
4129 /* Seagate NCQ + FLUSH CACHE firmware bug */
4130 { "ST31500341AS", "SD15", ATA_HORKAGE_NONCQ |
4131 ATA_HORKAGE_FIRMWARE_WARN },
4132 { "ST31500341AS", "SD16", ATA_HORKAGE_NONCQ |
4133 ATA_HORKAGE_FIRMWARE_WARN },
4134 { "ST31500341AS", "SD17", ATA_HORKAGE_NONCQ |
4135 ATA_HORKAGE_FIRMWARE_WARN },
4136 { "ST31500341AS", "SD18", ATA_HORKAGE_NONCQ |
4137 ATA_HORKAGE_FIRMWARE_WARN },
4138 { "ST31500341AS", "SD19", ATA_HORKAGE_NONCQ |
4139 ATA_HORKAGE_FIRMWARE_WARN },
4141 { "ST31000333AS", "SD15", ATA_HORKAGE_NONCQ |
4142 ATA_HORKAGE_FIRMWARE_WARN },
4143 { "ST31000333AS", "SD16", ATA_HORKAGE_NONCQ |
4144 ATA_HORKAGE_FIRMWARE_WARN },
4145 { "ST31000333AS", "SD17", ATA_HORKAGE_NONCQ |
4146 ATA_HORKAGE_FIRMWARE_WARN },
4147 { "ST31000333AS", "SD18", ATA_HORKAGE_NONCQ |
4148 ATA_HORKAGE_FIRMWARE_WARN },
4149 { "ST31000333AS", "SD19", ATA_HORKAGE_NONCQ |
4150 ATA_HORKAGE_FIRMWARE_WARN },
4152 { "ST3640623AS", "SD15", ATA_HORKAGE_NONCQ |
4153 ATA_HORKAGE_FIRMWARE_WARN },
4154 { "ST3640623AS", "SD16", ATA_HORKAGE_NONCQ |
4155 ATA_HORKAGE_FIRMWARE_WARN },
4156 { "ST3640623AS", "SD17", ATA_HORKAGE_NONCQ |
4157 ATA_HORKAGE_FIRMWARE_WARN },
4158 { "ST3640623AS", "SD18", ATA_HORKAGE_NONCQ |
4159 ATA_HORKAGE_FIRMWARE_WARN },
4160 { "ST3640623AS", "SD19", ATA_HORKAGE_NONCQ |
4161 ATA_HORKAGE_FIRMWARE_WARN },
4163 { "ST3640323AS", "SD15", ATA_HORKAGE_NONCQ |
4164 ATA_HORKAGE_FIRMWARE_WARN },
4165 { "ST3640323AS", "SD16", ATA_HORKAGE_NONCQ |
4166 ATA_HORKAGE_FIRMWARE_WARN },
4167 { "ST3640323AS", "SD17", ATA_HORKAGE_NONCQ |
4168 ATA_HORKAGE_FIRMWARE_WARN },
4169 { "ST3640323AS", "SD18", ATA_HORKAGE_NONCQ |
4170 ATA_HORKAGE_FIRMWARE_WARN },
4171 { "ST3640323AS", "SD19", ATA_HORKAGE_NONCQ |
4172 ATA_HORKAGE_FIRMWARE_WARN },
4174 { "ST3320813AS", "SD15", ATA_HORKAGE_NONCQ |
4175 ATA_HORKAGE_FIRMWARE_WARN },
4176 { "ST3320813AS", "SD16", ATA_HORKAGE_NONCQ |
4177 ATA_HORKAGE_FIRMWARE_WARN },
4178 { "ST3320813AS", "SD17", ATA_HORKAGE_NONCQ |
4179 ATA_HORKAGE_FIRMWARE_WARN },
4180 { "ST3320813AS", "SD18", ATA_HORKAGE_NONCQ |
4181 ATA_HORKAGE_FIRMWARE_WARN },
4182 { "ST3320813AS", "SD19", ATA_HORKAGE_NONCQ |
4183 ATA_HORKAGE_FIRMWARE_WARN },
4185 { "ST3320613AS", "SD15", ATA_HORKAGE_NONCQ |
4186 ATA_HORKAGE_FIRMWARE_WARN },
4187 { "ST3320613AS", "SD16", ATA_HORKAGE_NONCQ |
4188 ATA_HORKAGE_FIRMWARE_WARN },
4189 { "ST3320613AS", "SD17", ATA_HORKAGE_NONCQ |
4190 ATA_HORKAGE_FIRMWARE_WARN },
4191 { "ST3320613AS", "SD18", ATA_HORKAGE_NONCQ |
4192 ATA_HORKAGE_FIRMWARE_WARN },
4193 { "ST3320613AS", "SD19", ATA_HORKAGE_NONCQ |
4194 ATA_HORKAGE_FIRMWARE_WARN },
4196 /* Blacklist entries taken from Silicon Image 3124/3132
4197 Windows driver .inf file - also several Linux problem reports */
4198 { "HTS541060G9SA00", "MB3OC60D", ATA_HORKAGE_NONCQ, },
4199 { "HTS541080G9SA00", "MB4OC60D", ATA_HORKAGE_NONCQ, },
4200 { "HTS541010G9SA00", "MBZOC60D", ATA_HORKAGE_NONCQ, },
4202 /* devices which puke on READ_NATIVE_MAX */
4203 { "HDS724040KLSA80", "KFAOA20N", ATA_HORKAGE_BROKEN_HPA, },
4204 { "WDC WD3200JD-00KLB0", "WD-WCAMR1130137", ATA_HORKAGE_BROKEN_HPA },
4205 { "WDC WD2500JD-00HBB0", "WD-WMAL71490727", ATA_HORKAGE_BROKEN_HPA },
4206 { "MAXTOR 6L080L4", "A93.0500", ATA_HORKAGE_BROKEN_HPA },
4208 /* Devices which report 1 sector over size HPA */
4209 { "ST340823A", NULL, ATA_HORKAGE_HPA_SIZE, },
4210 { "ST320413A", NULL, ATA_HORKAGE_HPA_SIZE, },
4211 { "ST310211A", NULL, ATA_HORKAGE_HPA_SIZE, },
4213 /* Devices which get the IVB wrong */
4214 { "QUANTUM FIREBALLlct10 05", "A03.0900", ATA_HORKAGE_IVB, },
4215 /* Maybe we should just blacklist TSSTcorp... */
4216 { "TSSTcorp CDDVDW SH-S202H", "SB00", ATA_HORKAGE_IVB, },
4217 { "TSSTcorp CDDVDW SH-S202H", "SB01", ATA_HORKAGE_IVB, },
4218 { "TSSTcorp CDDVDW SH-S202J", "SB00", ATA_HORKAGE_IVB, },
4219 { "TSSTcorp CDDVDW SH-S202J", "SB01", ATA_HORKAGE_IVB, },
4220 { "TSSTcorp CDDVDW SH-S202N", "SB00", ATA_HORKAGE_IVB, },
4221 { "TSSTcorp CDDVDW SH-S202N", "SB01", ATA_HORKAGE_IVB, },
4223 /* Devices that do not need bridging limits applied */
4224 { "MTRON MSP-SATA*", NULL, ATA_HORKAGE_BRIDGE_OK, },
4230 static int strn_pattern_cmp(const char *patt, const char *name, int wildchar)
4236 * check for trailing wildcard: *\0
4238 p = strchr(patt, wildchar);
4239 if (p && ((*(p + 1)) == 0))
4250 return strncmp(patt, name, len);
4253 static unsigned long ata_dev_blacklisted(const struct ata_device *dev)
4255 unsigned char model_num[ATA_ID_PROD_LEN + 1];
4256 unsigned char model_rev[ATA_ID_FW_REV_LEN + 1];
4257 const struct ata_blacklist_entry *ad = ata_device_blacklist;
4259 ata_id_c_string(dev->id, model_num, ATA_ID_PROD, sizeof(model_num));
4260 ata_id_c_string(dev->id, model_rev, ATA_ID_FW_REV, sizeof(model_rev));
4262 while (ad->model_num) {
4263 if (!strn_pattern_cmp(ad->model_num, model_num, '*')) {
4264 if (ad->model_rev == NULL)
4266 if (!strn_pattern_cmp(ad->model_rev, model_rev, '*'))
4274 static int ata_dma_blacklisted(const struct ata_device *dev)
4276 /* We don't support polling DMA.
4277 * DMA blacklist those ATAPI devices with CDB-intr (and use PIO)
4278 * if the LLDD handles only interrupts in the HSM_ST_LAST state.
4280 if ((dev->link->ap->flags & ATA_FLAG_PIO_POLLING) &&
4281 (dev->flags & ATA_DFLAG_CDB_INTR))
4283 return (dev->horkage & ATA_HORKAGE_NODMA) ? 1 : 0;
4287 * ata_is_40wire - check drive side detection
4290 * Perform drive side detection decoding, allowing for device vendors
4291 * who can't follow the documentation.
4294 static int ata_is_40wire(struct ata_device *dev)
4296 if (dev->horkage & ATA_HORKAGE_IVB)
4297 return ata_drive_40wire_relaxed(dev->id);
4298 return ata_drive_40wire(dev->id);
4302 * cable_is_40wire - 40/80/SATA decider
4303 * @ap: port to consider
4305 * This function encapsulates the policy for speed management
4306 * in one place. At the moment we don't cache the result but
4307 * there is a good case for setting ap->cbl to the result when
4308 * we are called with unknown cables (and figuring out if it
4309 * impacts hotplug at all).
4311 * Return 1 if the cable appears to be 40 wire.
4314 static int cable_is_40wire(struct ata_port *ap)
4316 struct ata_link *link;
4317 struct ata_device *dev;
4319 /* If the controller thinks we are 40 wire, we are. */
4320 if (ap->cbl == ATA_CBL_PATA40)
4323 /* If the controller thinks we are 80 wire, we are. */
4324 if (ap->cbl == ATA_CBL_PATA80 || ap->cbl == ATA_CBL_SATA)
4327 /* If the system is known to be 40 wire short cable (eg
4328 * laptop), then we allow 80 wire modes even if the drive
4331 if (ap->cbl == ATA_CBL_PATA40_SHORT)
4334 /* If the controller doesn't know, we scan.
4336 * Note: We look for all 40 wire detects at this point. Any
4337 * 80 wire detect is taken to be 80 wire cable because
4338 * - in many setups only the one drive (slave if present) will
4339 * give a valid detect
4340 * - if you have a non detect capable drive you don't want it
4341 * to colour the choice
4343 ata_for_each_link(link, ap, EDGE) {
4344 ata_for_each_dev(dev, link, ENABLED) {
4345 if (!ata_is_40wire(dev))
4353 * ata_dev_xfermask - Compute supported xfermask of the given device
4354 * @dev: Device to compute xfermask for
4356 * Compute supported xfermask of @dev and store it in
4357 * dev->*_mask. This function is responsible for applying all
4358 * known limits including host controller limits, device
4364 static void ata_dev_xfermask(struct ata_device *dev)
4366 struct ata_link *link = dev->link;
4367 struct ata_port *ap = link->ap;
4368 struct ata_host *host = ap->host;
4369 unsigned long xfer_mask;
4371 /* controller modes available */
4372 xfer_mask = ata_pack_xfermask(ap->pio_mask,
4373 ap->mwdma_mask, ap->udma_mask);
4375 /* drive modes available */
4376 xfer_mask &= ata_pack_xfermask(dev->pio_mask,
4377 dev->mwdma_mask, dev->udma_mask);
4378 xfer_mask &= ata_id_xfermask(dev->id);
4381 * CFA Advanced TrueIDE timings are not allowed on a shared
4384 if (ata_dev_pair(dev)) {
4385 /* No PIO5 or PIO6 */
4386 xfer_mask &= ~(0x03 << (ATA_SHIFT_PIO + 5));
4387 /* No MWDMA3 or MWDMA 4 */
4388 xfer_mask &= ~(0x03 << (ATA_SHIFT_MWDMA + 3));
4391 if (ata_dma_blacklisted(dev)) {
4392 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4393 ata_dev_printk(dev, KERN_WARNING,
4394 "device is on DMA blacklist, disabling DMA\n");
4397 if ((host->flags & ATA_HOST_SIMPLEX) &&
4398 host->simplex_claimed && host->simplex_claimed != ap) {
4399 xfer_mask &= ~(ATA_MASK_MWDMA | ATA_MASK_UDMA);
4400 ata_dev_printk(dev, KERN_WARNING, "simplex DMA is claimed by "
4401 "other device, disabling DMA\n");
4404 if (ap->flags & ATA_FLAG_NO_IORDY)
4405 xfer_mask &= ata_pio_mask_no_iordy(dev);
4407 if (ap->ops->mode_filter)
4408 xfer_mask = ap->ops->mode_filter(dev, xfer_mask);
4410 /* Apply cable rule here. Don't apply it early because when
4411 * we handle hot plug the cable type can itself change.
4412 * Check this last so that we know if the transfer rate was
4413 * solely limited by the cable.
4414 * Unknown or 80 wire cables reported host side are checked
4415 * drive side as well. Cases where we know a 40wire cable
4416 * is used safely for 80 are not checked here.
4418 if (xfer_mask & (0xF8 << ATA_SHIFT_UDMA))
4419 /* UDMA/44 or higher would be available */
4420 if (cable_is_40wire(ap)) {
4421 ata_dev_printk(dev, KERN_WARNING,
4422 "limited to UDMA/33 due to 40-wire cable\n");
4423 xfer_mask &= ~(0xF8 << ATA_SHIFT_UDMA);
4426 ata_unpack_xfermask(xfer_mask, &dev->pio_mask,
4427 &dev->mwdma_mask, &dev->udma_mask);
4431 * ata_dev_set_xfermode - Issue SET FEATURES - XFER MODE command
4432 * @dev: Device to which command will be sent
4434 * Issue SET FEATURES - XFER MODE command to device @dev
4438 * PCI/etc. bus probe sem.
4441 * 0 on success, AC_ERR_* mask otherwise.
4444 static unsigned int ata_dev_set_xfermode(struct ata_device *dev)
4446 struct ata_taskfile tf;
4447 unsigned int err_mask;
4449 /* set up set-features taskfile */
4450 DPRINTK("set features - xfer mode\n");
4452 /* Some controllers and ATAPI devices show flaky interrupt
4453 * behavior after setting xfer mode. Use polling instead.
4455 ata_tf_init(dev, &tf);
4456 tf.command = ATA_CMD_SET_FEATURES;
4457 tf.feature = SETFEATURES_XFER;
4458 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_POLLING;
4459 tf.protocol = ATA_PROT_NODATA;
4460 /* If we are using IORDY we must send the mode setting command */
4461 if (ata_pio_need_iordy(dev))
4462 tf.nsect = dev->xfer_mode;
4463 /* If the device has IORDY and the controller does not - turn it off */
4464 else if (ata_id_has_iordy(dev->id))
4466 else /* In the ancient relic department - skip all of this */
4469 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4471 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4475 * ata_dev_set_feature - Issue SET FEATURES - SATA FEATURES
4476 * @dev: Device to which command will be sent
4477 * @enable: Whether to enable or disable the feature
4478 * @feature: The sector count represents the feature to set
4480 * Issue SET FEATURES - SATA FEATURES command to device @dev
4481 * on port @ap with sector count
4484 * PCI/etc. bus probe sem.
4487 * 0 on success, AC_ERR_* mask otherwise.
4489 static unsigned int ata_dev_set_feature(struct ata_device *dev, u8 enable,
4492 struct ata_taskfile tf;
4493 unsigned int err_mask;
4495 /* set up set-features taskfile */
4496 DPRINTK("set features - SATA features\n");
4498 ata_tf_init(dev, &tf);
4499 tf.command = ATA_CMD_SET_FEATURES;
4500 tf.feature = enable;
4501 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4502 tf.protocol = ATA_PROT_NODATA;
4505 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4507 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4512 * ata_dev_init_params - Issue INIT DEV PARAMS command
4513 * @dev: Device to which command will be sent
4514 * @heads: Number of heads (taskfile parameter)
4515 * @sectors: Number of sectors (taskfile parameter)
4518 * Kernel thread context (may sleep)
4521 * 0 on success, AC_ERR_* mask otherwise.
4523 static unsigned int ata_dev_init_params(struct ata_device *dev,
4524 u16 heads, u16 sectors)
4526 struct ata_taskfile tf;
4527 unsigned int err_mask;
4529 /* Number of sectors per track 1-255. Number of heads 1-16 */
4530 if (sectors < 1 || sectors > 255 || heads < 1 || heads > 16)
4531 return AC_ERR_INVALID;
4533 /* set up init dev params taskfile */
4534 DPRINTK("init dev params \n");
4536 ata_tf_init(dev, &tf);
4537 tf.command = ATA_CMD_INIT_DEV_PARAMS;
4538 tf.flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE;
4539 tf.protocol = ATA_PROT_NODATA;
4541 tf.device |= (heads - 1) & 0x0f; /* max head = num. of heads - 1 */
4543 err_mask = ata_exec_internal(dev, &tf, NULL, DMA_NONE, NULL, 0, 0);
4544 /* A clean abort indicates an original or just out of spec drive
4545 and we should continue as we issue the setup based on the
4546 drive reported working geometry */
4547 if (err_mask == AC_ERR_DEV && (tf.feature & ATA_ABORTED))
4550 DPRINTK("EXIT, err_mask=%x\n", err_mask);
4555 * ata_sg_clean - Unmap DMA memory associated with command
4556 * @qc: Command containing DMA memory to be released
4558 * Unmap all mapped DMA memory associated with this command.
4561 * spin_lock_irqsave(host lock)
4563 void ata_sg_clean(struct ata_queued_cmd *qc)
4565 struct ata_port *ap = qc->ap;
4566 struct scatterlist *sg = qc->sg;
4567 int dir = qc->dma_dir;
4569 WARN_ON_ONCE(sg == NULL);
4571 VPRINTK("unmapping %u sg elements\n", qc->n_elem);
4574 dma_unmap_sg(ap->dev, sg, qc->n_elem, dir);
4576 qc->flags &= ~ATA_QCFLAG_DMAMAP;
4581 * atapi_check_dma - Check whether ATAPI DMA can be supported
4582 * @qc: Metadata associated with taskfile to check
4584 * Allow low-level driver to filter ATA PACKET commands, returning
4585 * a status indicating whether or not it is OK to use DMA for the
4586 * supplied PACKET command.
4589 * spin_lock_irqsave(host lock)
4591 * RETURNS: 0 when ATAPI DMA can be used
4594 int atapi_check_dma(struct ata_queued_cmd *qc)
4596 struct ata_port *ap = qc->ap;
4598 /* Don't allow DMA if it isn't multiple of 16 bytes. Quite a
4599 * few ATAPI devices choke on such DMA requests.
4601 if (!(qc->dev->horkage & ATA_HORKAGE_ATAPI_MOD16_DMA) &&
4602 unlikely(qc->nbytes & 15))
4605 if (ap->ops->check_atapi_dma)
4606 return ap->ops->check_atapi_dma(qc);
4612 * ata_std_qc_defer - Check whether a qc needs to be deferred
4613 * @qc: ATA command in question
4615 * Non-NCQ commands cannot run with any other command, NCQ or
4616 * not. As upper layer only knows the queue depth, we are
4617 * responsible for maintaining exclusion. This function checks
4618 * whether a new command @qc can be issued.
4621 * spin_lock_irqsave(host lock)
4624 * ATA_DEFER_* if deferring is needed, 0 otherwise.
4626 int ata_std_qc_defer(struct ata_queued_cmd *qc)
4628 struct ata_link *link = qc->dev->link;
4630 if (qc->tf.protocol == ATA_PROT_NCQ) {
4631 if (!ata_tag_valid(link->active_tag))
4634 if (!ata_tag_valid(link->active_tag) && !link->sactive)
4638 return ATA_DEFER_LINK;
4641 void ata_noop_qc_prep(struct ata_queued_cmd *qc) { }
4644 * ata_sg_init - Associate command with scatter-gather table.
4645 * @qc: Command to be associated
4646 * @sg: Scatter-gather table.
4647 * @n_elem: Number of elements in s/g table.
4649 * Initialize the data-related elements of queued_cmd @qc
4650 * to point to a scatter-gather table @sg, containing @n_elem
4654 * spin_lock_irqsave(host lock)
4656 void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
4657 unsigned int n_elem)
4660 qc->n_elem = n_elem;
4665 * ata_sg_setup - DMA-map the scatter-gather table associated with a command.
4666 * @qc: Command with scatter-gather table to be mapped.
4668 * DMA-map the scatter-gather table associated with queued_cmd @qc.
4671 * spin_lock_irqsave(host lock)
4674 * Zero on success, negative on error.
4677 static int ata_sg_setup(struct ata_queued_cmd *qc)
4679 struct ata_port *ap = qc->ap;
4680 unsigned int n_elem;
4682 VPRINTK("ENTER, ata%u\n", ap->print_id);
4684 n_elem = dma_map_sg(ap->dev, qc->sg, qc->n_elem, qc->dma_dir);
4688 DPRINTK("%d sg elements mapped\n", n_elem);
4690 qc->n_elem = n_elem;
4691 qc->flags |= ATA_QCFLAG_DMAMAP;
4697 * swap_buf_le16 - swap halves of 16-bit words in place
4698 * @buf: Buffer to swap
4699 * @buf_words: Number of 16-bit words in buffer.
4701 * Swap halves of 16-bit words if needed to convert from
4702 * little-endian byte order to native cpu byte order, or
4706 * Inherited from caller.
4708 void swap_buf_le16(u16 *buf, unsigned int buf_words)
4713 for (i = 0; i < buf_words; i++)
4714 buf[i] = le16_to_cpu(buf[i]);
4715 #endif /* __BIG_ENDIAN */
4719 * ata_qc_new - Request an available ATA command, for queueing
4726 static struct ata_queued_cmd *ata_qc_new(struct ata_port *ap)
4728 struct ata_queued_cmd *qc = NULL;
4731 /* no command while frozen */
4732 if (unlikely(ap->pflags & ATA_PFLAG_FROZEN))
4735 /* the last tag is reserved for internal command. */
4736 for (i = 0; i < ATA_MAX_QUEUE - 1; i++)
4737 if (!test_and_set_bit(i, &ap->qc_allocated)) {
4738 qc = __ata_qc_from_tag(ap, i);
4749 * ata_qc_new_init - Request an available ATA command, and initialize it
4750 * @dev: Device from whom we request an available command structure
4756 struct ata_queued_cmd *ata_qc_new_init(struct ata_device *dev)
4758 struct ata_port *ap = dev->link->ap;
4759 struct ata_queued_cmd *qc;
4761 qc = ata_qc_new(ap);
4774 * ata_qc_free - free unused ata_queued_cmd
4775 * @qc: Command to complete
4777 * Designed to free unused ata_queued_cmd object
4778 * in case something prevents using it.
4781 * spin_lock_irqsave(host lock)
4783 void ata_qc_free(struct ata_queued_cmd *qc)
4785 struct ata_port *ap = qc->ap;
4788 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4792 if (likely(ata_tag_valid(tag))) {
4793 qc->tag = ATA_TAG_POISON;
4794 clear_bit(tag, &ap->qc_allocated);
4798 void __ata_qc_complete(struct ata_queued_cmd *qc)
4800 struct ata_port *ap = qc->ap;
4801 struct ata_link *link = qc->dev->link;
4803 WARN_ON_ONCE(qc == NULL); /* ata_qc_from_tag _might_ return NULL */
4804 WARN_ON_ONCE(!(qc->flags & ATA_QCFLAG_ACTIVE));
4806 if (likely(qc->flags & ATA_QCFLAG_DMAMAP))
4809 /* command should be marked inactive atomically with qc completion */
4810 if (qc->tf.protocol == ATA_PROT_NCQ) {
4811 link->sactive &= ~(1 << qc->tag);
4813 ap->nr_active_links--;
4815 link->active_tag = ATA_TAG_POISON;
4816 ap->nr_active_links--;
4819 /* clear exclusive status */
4820 if (unlikely(qc->flags & ATA_QCFLAG_CLEAR_EXCL &&
4821 ap->excl_link == link))
4822 ap->excl_link = NULL;
4824 /* atapi: mark qc as inactive to prevent the interrupt handler
4825 * from completing the command twice later, before the error handler
4826 * is called. (when rc != 0 and atapi request sense is needed)
4828 qc->flags &= ~ATA_QCFLAG_ACTIVE;
4829 ap->qc_active &= ~(1 << qc->tag);
4831 /* call completion callback */
4832 qc->complete_fn(qc);
4835 static void fill_result_tf(struct ata_queued_cmd *qc)
4837 struct ata_port *ap = qc->ap;
4839 qc->result_tf.flags = qc->tf.flags;
4840 ap->ops->qc_fill_rtf(qc);
4843 static void ata_verify_xfer(struct ata_queued_cmd *qc)
4845 struct ata_device *dev = qc->dev;
4847 if (ata_tag_internal(qc->tag))
4850 if (ata_is_nodata(qc->tf.protocol))
4853 if ((dev->mwdma_mask || dev->udma_mask) && ata_is_pio(qc->tf.protocol))
4856 dev->flags &= ~ATA_DFLAG_DUBIOUS_XFER;
4860 * ata_qc_complete - Complete an active ATA command
4861 * @qc: Command to complete
4863 * Indicate to the mid and upper layers that an ATA
4864 * command has completed, with either an ok or not-ok status.
4867 * spin_lock_irqsave(host lock)
4869 void ata_qc_complete(struct ata_queued_cmd *qc)
4871 struct ata_port *ap = qc->ap;
4873 /* XXX: New EH and old EH use different mechanisms to
4874 * synchronize EH with regular execution path.
4876 * In new EH, a failed qc is marked with ATA_QCFLAG_FAILED.
4877 * Normal execution path is responsible for not accessing a
4878 * failed qc. libata core enforces the rule by returning NULL
4879 * from ata_qc_from_tag() for failed qcs.
4881 * Old EH depends on ata_qc_complete() nullifying completion
4882 * requests if ATA_QCFLAG_EH_SCHEDULED is set. Old EH does
4883 * not synchronize with interrupt handler. Only PIO task is
4886 if (ap->ops->error_handler) {
4887 struct ata_device *dev = qc->dev;
4888 struct ata_eh_info *ehi = &dev->link->eh_info;
4890 WARN_ON_ONCE(ap->pflags & ATA_PFLAG_FROZEN);
4892 if (unlikely(qc->err_mask))
4893 qc->flags |= ATA_QCFLAG_FAILED;
4895 if (unlikely(qc->flags & ATA_QCFLAG_FAILED)) {
4896 if (!ata_tag_internal(qc->tag)) {
4897 /* always fill result TF for failed qc */
4899 ata_qc_schedule_eh(qc);
4904 /* read result TF if requested */
4905 if (qc->flags & ATA_QCFLAG_RESULT_TF)
4908 /* Some commands need post-processing after successful
4911 switch (qc->tf.command) {
4912 case ATA_CMD_SET_FEATURES:
4913 if (qc->tf.feature != SETFEATURES_WC_ON &&
4914 qc->tf.feature != SETFEATURES_WC_OFF)
4917 case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
4918 case ATA_CMD_SET_MULTI: /* multi_count changed */
4919 /* revalidate device */
4920 ehi->dev_action[dev->devno] |= ATA_EH_REVALIDATE;
4921 ata_port_schedule_eh(ap);
4925 dev->flags |= ATA_DFLAG_SLEEPING;
4929 if (unlikely(dev->flags & ATA_DFLAG_DUBIOUS_XFER))
4930 ata_verify_xfer(qc);
4932 __ata_qc_complete(qc);
4934 if (qc->flags & ATA_QCFLAG_EH_SCHEDULED)
4937 /* read result TF if failed or requested */
4938 if (qc->err_mask || qc->flags & ATA_QCFLAG_RESULT_TF)
4941 __ata_qc_complete(qc);
4946 * ata_qc_complete_multiple - Complete multiple qcs successfully
4947 * @ap: port in question
4948 * @qc_active: new qc_active mask
4950 * Complete in-flight commands. This functions is meant to be
4951 * called from low-level driver's interrupt routine to complete
4952 * requests normally. ap->qc_active and @qc_active is compared
4953 * and commands are completed accordingly.
4956 * spin_lock_irqsave(host lock)
4959 * Number of completed commands on success, -errno otherwise.
4961 int ata_qc_complete_multiple(struct ata_port *ap, u32 qc_active)
4967 done_mask = ap->qc_active ^ qc_active;
4969 if (unlikely(done_mask & qc_active)) {
4970 ata_port_printk(ap, KERN_ERR, "illegal qc_active transition "
4971 "(%08x->%08x)\n", ap->qc_active, qc_active);
4975 for (i = 0; i < ATA_MAX_QUEUE; i++) {
4976 struct ata_queued_cmd *qc;
4978 if (!(done_mask & (1 << i)))
4981 if ((qc = ata_qc_from_tag(ap, i))) {
4982 ata_qc_complete(qc);
4991 * ata_qc_issue - issue taskfile to device
4992 * @qc: command to issue to device
4994 * Prepare an ATA command to submission to device.
4995 * This includes mapping the data into a DMA-able
4996 * area, filling in the S/G table, and finally
4997 * writing the taskfile to hardware, starting the command.
5000 * spin_lock_irqsave(host lock)
5002 void ata_qc_issue(struct ata_queued_cmd *qc)
5004 struct ata_port *ap = qc->ap;
5005 struct ata_link *link = qc->dev->link;
5006 u8 prot = qc->tf.protocol;
5008 /* Make sure only one non-NCQ command is outstanding. The
5009 * check is skipped for old EH because it reuses active qc to
5010 * request ATAPI sense.
5012 WARN_ON_ONCE(ap->ops->error_handler && ata_tag_valid(link->active_tag));
5014 if (ata_is_ncq(prot)) {
5015 WARN_ON_ONCE(link->sactive & (1 << qc->tag));
5018 ap->nr_active_links++;
5019 link->sactive |= 1 << qc->tag;
5021 WARN_ON_ONCE(link->sactive);
5023 ap->nr_active_links++;
5024 link->active_tag = qc->tag;
5027 qc->flags |= ATA_QCFLAG_ACTIVE;
5028 ap->qc_active |= 1 << qc->tag;
5030 /* We guarantee to LLDs that they will have at least one
5031 * non-zero sg if the command is a data command.
5033 BUG_ON(ata_is_data(prot) && (!qc->sg || !qc->n_elem || !qc->nbytes));
5035 if (ata_is_dma(prot) || (ata_is_pio(prot) &&
5036 (ap->flags & ATA_FLAG_PIO_DMA)))
5037 if (ata_sg_setup(qc))
5040 /* if device is sleeping, schedule reset and abort the link */
5041 if (unlikely(qc->dev->flags & ATA_DFLAG_SLEEPING)) {
5042 link->eh_info.action |= ATA_EH_RESET;
5043 ata_ehi_push_desc(&link->eh_info, "waking up from sleep");
5044 ata_link_abort(link);
5048 ap->ops->qc_prep(qc);
5050 qc->err_mask |= ap->ops->qc_issue(qc);
5051 if (unlikely(qc->err_mask))
5056 qc->err_mask |= AC_ERR_SYSTEM;
5058 ata_qc_complete(qc);
5062 * sata_scr_valid - test whether SCRs are accessible
5063 * @link: ATA link to test SCR accessibility for
5065 * Test whether SCRs are accessible for @link.
5071 * 1 if SCRs are accessible, 0 otherwise.
5073 int sata_scr_valid(struct ata_link *link)
5075 struct ata_port *ap = link->ap;
5077 return (ap->flags & ATA_FLAG_SATA) && ap->ops->scr_read;
5081 * sata_scr_read - read SCR register of the specified port
5082 * @link: ATA link to read SCR for
5084 * @val: Place to store read value
5086 * Read SCR register @reg of @link into *@val. This function is
5087 * guaranteed to succeed if @link is ap->link, the cable type of
5088 * the port is SATA and the port implements ->scr_read.
5091 * None if @link is ap->link. Kernel thread context otherwise.
5094 * 0 on success, negative errno on failure.
5096 int sata_scr_read(struct ata_link *link, int reg, u32 *val)
5098 if (ata_is_host_link(link)) {
5099 if (sata_scr_valid(link))
5100 return link->ap->ops->scr_read(link, reg, val);
5104 return sata_pmp_scr_read(link, reg, val);
5108 * sata_scr_write - write SCR register of the specified port
5109 * @link: ATA link to write SCR for
5110 * @reg: SCR to write
5111 * @val: value to write
5113 * Write @val to SCR register @reg of @link. This function is
5114 * guaranteed to succeed if @link is ap->link, the cable type of
5115 * the port is SATA and the port implements ->scr_read.
5118 * None if @link is ap->link. Kernel thread context otherwise.
5121 * 0 on success, negative errno on failure.
5123 int sata_scr_write(struct ata_link *link, int reg, u32 val)
5125 if (ata_is_host_link(link)) {
5126 if (sata_scr_valid(link))
5127 return link->ap->ops->scr_write(link, reg, val);
5131 return sata_pmp_scr_write(link, reg, val);
5135 * sata_scr_write_flush - write SCR register of the specified port and flush
5136 * @link: ATA link to write SCR for
5137 * @reg: SCR to write
5138 * @val: value to write
5140 * This function is identical to sata_scr_write() except that this
5141 * function performs flush after writing to the register.
5144 * None if @link is ap->link. Kernel thread context otherwise.
5147 * 0 on success, negative errno on failure.
5149 int sata_scr_write_flush(struct ata_link *link, int reg, u32 val)
5151 if (ata_is_host_link(link)) {
5154 if (sata_scr_valid(link)) {
5155 rc = link->ap->ops->scr_write(link, reg, val);
5157 rc = link->ap->ops->scr_read(link, reg, &val);
5163 return sata_pmp_scr_write(link, reg, val);
5167 * ata_phys_link_online - test whether the given link is online
5168 * @link: ATA link to test
5170 * Test whether @link is online. Note that this function returns
5171 * 0 if online status of @link cannot be obtained, so
5172 * ata_link_online(link) != !ata_link_offline(link).
5178 * True if the port online status is available and online.
5180 bool ata_phys_link_online(struct ata_link *link)
5184 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5185 ata_sstatus_online(sstatus))
5191 * ata_phys_link_offline - test whether the given link is offline
5192 * @link: ATA link to test
5194 * Test whether @link is offline. Note that this function
5195 * returns 0 if offline status of @link cannot be obtained, so
5196 * ata_link_online(link) != !ata_link_offline(link).
5202 * True if the port offline status is available and offline.
5204 bool ata_phys_link_offline(struct ata_link *link)
5208 if (sata_scr_read(link, SCR_STATUS, &sstatus) == 0 &&
5209 !ata_sstatus_online(sstatus))
5215 * ata_link_online - test whether the given link is online
5216 * @link: ATA link to test
5218 * Test whether @link is online. This is identical to
5219 * ata_phys_link_online() when there's no slave link. When
5220 * there's a slave link, this function should only be called on
5221 * the master link and will return true if any of M/S links is
5228 * True if the port online status is available and online.
5230 bool ata_link_online(struct ata_link *link)
5232 struct ata_link *slave = link->ap->slave_link;
5234 WARN_ON(link == slave); /* shouldn't be called on slave link */
5236 return ata_phys_link_online(link) ||
5237 (slave && ata_phys_link_online(slave));
5241 * ata_link_offline - test whether the given link is offline
5242 * @link: ATA link to test
5244 * Test whether @link is offline. This is identical to
5245 * ata_phys_link_offline() when there's no slave link. When
5246 * there's a slave link, this function should only be called on
5247 * the master link and will return true if both M/S links are
5254 * True if the port offline status is available and offline.
5256 bool ata_link_offline(struct ata_link *link)
5258 struct ata_link *slave = link->ap->slave_link;
5260 WARN_ON(link == slave); /* shouldn't be called on slave link */
5262 return ata_phys_link_offline(link) &&
5263 (!slave || ata_phys_link_offline(slave));
5267 static int ata_host_request_pm(struct ata_host *host, pm_message_t mesg,
5268 unsigned int action, unsigned int ehi_flags,
5271 unsigned long flags;
5274 for (i = 0; i < host->n_ports; i++) {
5275 struct ata_port *ap = host->ports[i];
5276 struct ata_link *link;
5278 /* Previous resume operation might still be in
5279 * progress. Wait for PM_PENDING to clear.
5281 if (ap->pflags & ATA_PFLAG_PM_PENDING) {
5282 ata_port_wait_eh(ap);
5283 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5286 /* request PM ops to EH */
5287 spin_lock_irqsave(ap->lock, flags);
5292 ap->pm_result = &rc;
5295 ap->pflags |= ATA_PFLAG_PM_PENDING;
5296 ata_for_each_link(link, ap, HOST_FIRST) {
5297 link->eh_info.action |= action;
5298 link->eh_info.flags |= ehi_flags;
5301 ata_port_schedule_eh(ap);
5303 spin_unlock_irqrestore(ap->lock, flags);
5305 /* wait and check result */
5307 ata_port_wait_eh(ap);
5308 WARN_ON(ap->pflags & ATA_PFLAG_PM_PENDING);
5318 * ata_host_suspend - suspend host
5319 * @host: host to suspend
5322 * Suspend @host. Actual operation is performed by EH. This
5323 * function requests EH to perform PM operations and waits for EH
5327 * Kernel thread context (may sleep).
5330 * 0 on success, -errno on failure.
5332 int ata_host_suspend(struct ata_host *host, pm_message_t mesg)
5337 * disable link pm on all ports before requesting
5340 ata_lpm_enable(host);
5342 rc = ata_host_request_pm(host, mesg, 0, ATA_EHI_QUIET, 1);
5344 host->dev->power.power_state = mesg;
5349 * ata_host_resume - resume host
5350 * @host: host to resume
5352 * Resume @host. Actual operation is performed by EH. This
5353 * function requests EH to perform PM operations and returns.
5354 * Note that all resume operations are performed parallely.
5357 * Kernel thread context (may sleep).
5359 void ata_host_resume(struct ata_host *host)
5361 ata_host_request_pm(host, PMSG_ON, ATA_EH_RESET,
5362 ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET, 0);
5363 host->dev->power.power_state = PMSG_ON;
5365 /* reenable link pm */
5366 ata_lpm_disable(host);
5371 * ata_port_start - Set port up for dma.
5372 * @ap: Port to initialize
5374 * Called just after data structures for each port are
5375 * initialized. Allocates space for PRD table.
5377 * May be used as the port_start() entry in ata_port_operations.
5380 * Inherited from caller.
5382 int ata_port_start(struct ata_port *ap)
5384 struct device *dev = ap->dev;
5386 ap->prd = dmam_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma,
5395 * ata_dev_init - Initialize an ata_device structure
5396 * @dev: Device structure to initialize
5398 * Initialize @dev in preparation for probing.
5401 * Inherited from caller.
5403 void ata_dev_init(struct ata_device *dev)
5405 struct ata_link *link = ata_dev_phys_link(dev);
5406 struct ata_port *ap = link->ap;
5407 unsigned long flags;
5409 /* SATA spd limit is bound to the attached device, reset together */
5410 link->sata_spd_limit = link->hw_sata_spd_limit;
5413 /* High bits of dev->flags are used to record warm plug
5414 * requests which occur asynchronously. Synchronize using
5417 spin_lock_irqsave(ap->lock, flags);
5418 dev->flags &= ~ATA_DFLAG_INIT_MASK;
5420 spin_unlock_irqrestore(ap->lock, flags);
5422 memset((void *)dev + ATA_DEVICE_CLEAR_BEGIN, 0,
5423 ATA_DEVICE_CLEAR_END - ATA_DEVICE_CLEAR_BEGIN);
5424 dev->pio_mask = UINT_MAX;
5425 dev->mwdma_mask = UINT_MAX;
5426 dev->udma_mask = UINT_MAX;
5430 * ata_link_init - Initialize an ata_link structure
5431 * @ap: ATA port link is attached to
5432 * @link: Link structure to initialize
5433 * @pmp: Port multiplier port number
5438 * Kernel thread context (may sleep)
5440 void ata_link_init(struct ata_port *ap, struct ata_link *link, int pmp)
5444 /* clear everything except for devices */
5445 memset(link, 0, offsetof(struct ata_link, device[0]));
5449 link->active_tag = ATA_TAG_POISON;
5450 link->hw_sata_spd_limit = UINT_MAX;
5452 /* can't use iterator, ap isn't initialized yet */
5453 for (i = 0; i < ATA_MAX_DEVICES; i++) {
5454 struct ata_device *dev = &link->device[i];
5457 dev->devno = dev - link->device;
5463 * sata_link_init_spd - Initialize link->sata_spd_limit
5464 * @link: Link to configure sata_spd_limit for
5466 * Initialize @link->[hw_]sata_spd_limit to the currently
5470 * Kernel thread context (may sleep).
5473 * 0 on success, -errno on failure.
5475 int sata_link_init_spd(struct ata_link *link)
5480 rc = sata_scr_read(link, SCR_CONTROL, &link->saved_scontrol);
5484 spd = (link->saved_scontrol >> 4) & 0xf;
5486 link->hw_sata_spd_limit &= (1 << spd) - 1;
5488 ata_force_link_limits(link);
5490 link->sata_spd_limit = link->hw_sata_spd_limit;
5496 * ata_port_alloc - allocate and initialize basic ATA port resources
5497 * @host: ATA host this allocated port belongs to
5499 * Allocate and initialize basic ATA port resources.
5502 * Allocate ATA port on success, NULL on failure.
5505 * Inherited from calling layer (may sleep).
5507 struct ata_port *ata_port_alloc(struct ata_host *host)
5509 struct ata_port *ap;
5513 ap = kzalloc(sizeof(*ap), GFP_KERNEL);
5517 ap->pflags |= ATA_PFLAG_INITIALIZING;
5518 ap->lock = &host->lock;
5519 ap->flags = ATA_FLAG_DISABLED;
5521 ap->ctl = ATA_DEVCTL_OBS;
5523 ap->dev = host->dev;
5524 ap->last_ctl = 0xFF;
5526 #if defined(ATA_VERBOSE_DEBUG)
5527 /* turn on all debugging levels */
5528 ap->msg_enable = 0x00FF;
5529 #elif defined(ATA_DEBUG)
5530 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_INFO | ATA_MSG_CTL | ATA_MSG_WARN | ATA_MSG_ERR;
5532 ap->msg_enable = ATA_MSG_DRV | ATA_MSG_ERR | ATA_MSG_WARN;
5535 #ifdef CONFIG_ATA_SFF
5536 INIT_DELAYED_WORK(&ap->port_task, ata_pio_task);
5538 INIT_DELAYED_WORK(&ap->port_task, NULL);
5540 INIT_DELAYED_WORK(&ap->hotplug_task, ata_scsi_hotplug);
5541 INIT_WORK(&ap->scsi_rescan_task, ata_scsi_dev_rescan);
5542 INIT_LIST_HEAD(&ap->eh_done_q);
5543 init_waitqueue_head(&ap->eh_wait_q);
5544 init_completion(&ap->park_req_pending);
5545 init_timer_deferrable(&ap->fastdrain_timer);
5546 ap->fastdrain_timer.function = ata_eh_fastdrain_timerfn;
5547 ap->fastdrain_timer.data = (unsigned long)ap;
5549 ap->cbl = ATA_CBL_NONE;
5551 ata_link_init(ap, &ap->link, 0);
5554 ap->stats.unhandled_irq = 1;
5555 ap->stats.idle_irq = 1;
5560 static void ata_host_release(struct device *gendev, void *res)
5562 struct ata_host *host = dev_get_drvdata(gendev);
5565 for (i = 0; i < host->n_ports; i++) {
5566 struct ata_port *ap = host->ports[i];
5572 scsi_host_put(ap->scsi_host);
5574 kfree(ap->pmp_link);
5575 kfree(ap->slave_link);
5577 host->ports[i] = NULL;
5580 dev_set_drvdata(gendev, NULL);
5584 * ata_host_alloc - allocate and init basic ATA host resources
5585 * @dev: generic device this host is associated with
5586 * @max_ports: maximum number of ATA ports associated with this host
5588 * Allocate and initialize basic ATA host resources. LLD calls
5589 * this function to allocate a host, initializes it fully and
5590 * attaches it using ata_host_register().
5592 * @max_ports ports are allocated and host->n_ports is
5593 * initialized to @max_ports. The caller is allowed to decrease
5594 * host->n_ports before calling ata_host_register(). The unused
5595 * ports will be automatically freed on registration.
5598 * Allocate ATA host on success, NULL on failure.
5601 * Inherited from calling layer (may sleep).
5603 struct ata_host *ata_host_alloc(struct device *dev, int max_ports)
5605 struct ata_host *host;
5611 if (!devres_open_group(dev, NULL, GFP_KERNEL))
5614 /* alloc a container for our list of ATA ports (buses) */
5615 sz = sizeof(struct ata_host) + (max_ports + 1) * sizeof(void *);
5616 /* alloc a container for our list of ATA ports (buses) */
5617 host = devres_alloc(ata_host_release, sz, GFP_KERNEL);
5621 devres_add(dev, host);
5622 dev_set_drvdata(dev, host);
5624 spin_lock_init(&host->lock);
5626 host->n_ports = max_ports;
5628 /* allocate ports bound to this host */
5629 for (i = 0; i < max_ports; i++) {
5630 struct ata_port *ap;
5632 ap = ata_port_alloc(host);
5637 host->ports[i] = ap;
5640 devres_remove_group(dev, NULL);
5644 devres_release_group(dev, NULL);
5649 * ata_host_alloc_pinfo - alloc host and init with port_info array
5650 * @dev: generic device this host is associated with
5651 * @ppi: array of ATA port_info to initialize host with
5652 * @n_ports: number of ATA ports attached to this host
5654 * Allocate ATA host and initialize with info from @ppi. If NULL
5655 * terminated, @ppi may contain fewer entries than @n_ports. The
5656 * last entry will be used for the remaining ports.
5659 * Allocate ATA host on success, NULL on failure.
5662 * Inherited from calling layer (may sleep).
5664 struct ata_host *ata_host_alloc_pinfo(struct device *dev,
5665 const struct ata_port_info * const * ppi,
5668 const struct ata_port_info *pi;
5669 struct ata_host *host;
5672 host = ata_host_alloc(dev, n_ports);
5676 for (i = 0, j = 0, pi = NULL; i < host->n_ports; i++) {
5677 struct ata_port *ap = host->ports[i];
5682 ap->pio_mask = pi->pio_mask;
5683 ap->mwdma_mask = pi->mwdma_mask;
5684 ap->udma_mask = pi->udma_mask;
5685 ap->flags |= pi->flags;
5686 ap->link.flags |= pi->link_flags;
5687 ap->ops = pi->port_ops;
5689 if (!host->ops && (pi->port_ops != &ata_dummy_port_ops))
5690 host->ops = pi->port_ops;
5697 * ata_slave_link_init - initialize slave link
5698 * @ap: port to initialize slave link for
5700 * Create and initialize slave link for @ap. This enables slave
5701 * link handling on the port.
5703 * In libata, a port contains links and a link contains devices.
5704 * There is single host link but if a PMP is attached to it,
5705 * there can be multiple fan-out links. On SATA, there's usually
5706 * a single device connected to a link but PATA and SATA
5707 * controllers emulating TF based interface can have two - master
5710 * However, there are a few controllers which don't fit into this
5711 * abstraction too well - SATA controllers which emulate TF
5712 * interface with both master and slave devices but also have
5713 * separate SCR register sets for each device. These controllers
5714 * need separate links for physical link handling
5715 * (e.g. onlineness, link speed) but should be treated like a
5716 * traditional M/S controller for everything else (e.g. command
5717 * issue, softreset).
5719 * slave_link is libata's way of handling this class of
5720 * controllers without impacting core layer too much. For
5721 * anything other than physical link handling, the default host
5722 * link is used for both master and slave. For physical link
5723 * handling, separate @ap->slave_link is used. All dirty details
5724 * are implemented inside libata core layer. From LLD's POV, the
5725 * only difference is that prereset, hardreset and postreset are
5726 * called once more for the slave link, so the reset sequence
5727 * looks like the following.
5729 * prereset(M) -> prereset(S) -> hardreset(M) -> hardreset(S) ->
5730 * softreset(M) -> postreset(M) -> postreset(S)
5732 * Note that softreset is called only for the master. Softreset
5733 * resets both M/S by definition, so SRST on master should handle
5734 * both (the standard method will work just fine).
5737 * Should be called before host is registered.
5740 * 0 on success, -errno on failure.
5742 int ata_slave_link_init(struct ata_port *ap)
5744 struct ata_link *link;
5746 WARN_ON(ap->slave_link);
5747 WARN_ON(ap->flags & ATA_FLAG_PMP);
5749 link = kzalloc(sizeof(*link), GFP_KERNEL);
5753 ata_link_init(ap, link, 1);
5754 ap->slave_link = link;
5758 static void ata_host_stop(struct device *gendev, void *res)
5760 struct ata_host *host = dev_get_drvdata(gendev);
5763 WARN_ON(!(host->flags & ATA_HOST_STARTED));
5765 for (i = 0; i < host->n_ports; i++) {
5766 struct ata_port *ap = host->ports[i];
5768 if (ap->ops->port_stop)
5769 ap->ops->port_stop(ap);
5772 if (host->ops->host_stop)
5773 host->ops->host_stop(host);
5777 * ata_finalize_port_ops - finalize ata_port_operations
5778 * @ops: ata_port_operations to finalize
5780 * An ata_port_operations can inherit from another ops and that
5781 * ops can again inherit from another. This can go on as many
5782 * times as necessary as long as there is no loop in the
5783 * inheritance chain.
5785 * Ops tables are finalized when the host is started. NULL or
5786 * unspecified entries are inherited from the closet ancestor
5787 * which has the method and the entry is populated with it.
5788 * After finalization, the ops table directly points to all the
5789 * methods and ->inherits is no longer necessary and cleared.
5791 * Using ATA_OP_NULL, inheriting ops can force a method to NULL.
5796 static void ata_finalize_port_ops(struct ata_port_operations *ops)
5798 static DEFINE_SPINLOCK(lock);
5799 const struct ata_port_operations *cur;
5800 void **begin = (void **)ops;
5801 void **end = (void **)&ops->inherits;
5804 if (!ops || !ops->inherits)
5809 for (cur = ops->inherits; cur; cur = cur->inherits) {
5810 void **inherit = (void **)cur;
5812 for (pp = begin; pp < end; pp++, inherit++)
5817 for (pp = begin; pp < end; pp++)
5821 ops->inherits = NULL;
5827 * ata_host_start - start and freeze ports of an ATA host
5828 * @host: ATA host to start ports for
5830 * Start and then freeze ports of @host. Started status is
5831 * recorded in host->flags, so this function can be called
5832 * multiple times. Ports are guaranteed to get started only
5833 * once. If host->ops isn't initialized yet, its set to the
5834 * first non-dummy port ops.
5837 * Inherited from calling layer (may sleep).
5840 * 0 if all ports are started successfully, -errno otherwise.
5842 int ata_host_start(struct ata_host *host)
5845 void *start_dr = NULL;
5848 if (host->flags & ATA_HOST_STARTED)
5851 ata_finalize_port_ops(host->ops);
5853 for (i = 0; i < host->n_ports; i++) {
5854 struct ata_port *ap = host->ports[i];
5856 ata_finalize_port_ops(ap->ops);
5858 if (!host->ops && !ata_port_is_dummy(ap))
5859 host->ops = ap->ops;
5861 if (ap->ops->port_stop)
5865 if (host->ops->host_stop)
5869 start_dr = devres_alloc(ata_host_stop, 0, GFP_KERNEL);
5874 for (i = 0; i < host->n_ports; i++) {
5875 struct ata_port *ap = host->ports[i];
5877 if (ap->ops->port_start) {
5878 rc = ap->ops->port_start(ap);
5881 dev_printk(KERN_ERR, host->dev,
5882 "failed to start port %d "
5883 "(errno=%d)\n", i, rc);
5887 ata_eh_freeze_port(ap);
5891 devres_add(host->dev, start_dr);
5892 host->flags |= ATA_HOST_STARTED;
5897 struct ata_port *ap = host->ports[i];
5899 if (ap->ops->port_stop)
5900 ap->ops->port_stop(ap);
5902 devres_free(start_dr);
5907 * ata_sas_host_init - Initialize a host struct
5908 * @host: host to initialize
5909 * @dev: device host is attached to
5910 * @flags: host flags
5914 * PCI/etc. bus probe sem.
5917 /* KILLME - the only user left is ipr */
5918 void ata_host_init(struct ata_host *host, struct device *dev,
5919 unsigned long flags, struct ata_port_operations *ops)
5921 spin_lock_init(&host->lock);
5923 host->flags = flags;
5928 static void async_port_probe(void *data, async_cookie_t cookie)
5931 struct ata_port *ap = data;
5934 * If we're not allowed to scan this host in parallel,
5935 * we need to wait until all previous scans have completed
5936 * before going further.
5937 * Jeff Garzik says this is only within a controller, so we
5938 * don't need to wait for port 0, only for later ports.
5940 if (!(ap->host->flags & ATA_HOST_PARALLEL_SCAN) && ap->port_no != 0)
5941 async_synchronize_cookie(cookie);
5944 if (ap->ops->error_handler) {
5945 struct ata_eh_info *ehi = &ap->link.eh_info;
5946 unsigned long flags;
5950 /* kick EH for boot probing */
5951 spin_lock_irqsave(ap->lock, flags);
5953 ehi->probe_mask |= ATA_ALL_DEVICES;
5954 ehi->action |= ATA_EH_RESET | ATA_EH_LPM;
5955 ehi->flags |= ATA_EHI_NO_AUTOPSY | ATA_EHI_QUIET;
5957 ap->pflags &= ~ATA_PFLAG_INITIALIZING;
5958 ap->pflags |= ATA_PFLAG_LOADING;
5959 ata_port_schedule_eh(ap);
5961 spin_unlock_irqrestore(ap->lock, flags);
5963 /* wait for EH to finish */
5964 ata_port_wait_eh(ap);
5966 DPRINTK("ata%u: bus probe begin\n", ap->print_id);
5967 rc = ata_bus_probe(ap);
5968 DPRINTK("ata%u: bus probe end\n", ap->print_id);
5971 /* FIXME: do something useful here?
5972 * Current libata behavior will
5973 * tear down everything when
5974 * the module is removed
5975 * or the h/w is unplugged.
5980 /* in order to keep device order, we need to synchronize at this point */
5981 async_synchronize_cookie(cookie);
5983 ata_scsi_scan_host(ap, 1);
5987 * ata_host_register - register initialized ATA host
5988 * @host: ATA host to register
5989 * @sht: template for SCSI host
5991 * Register initialized ATA host. @host is allocated using
5992 * ata_host_alloc() and fully initialized by LLD. This function
5993 * starts ports, registers @host with ATA and SCSI layers and
5994 * probe registered devices.
5997 * Inherited from calling layer (may sleep).
6000 * 0 on success, -errno otherwise.
6002 int ata_host_register(struct ata_host *host, struct scsi_host_template *sht)
6006 /* host must have been started */
6007 if (!(host->flags & ATA_HOST_STARTED)) {
6008 dev_printk(KERN_ERR, host->dev,
6009 "BUG: trying to register unstarted host\n");
6014 /* Blow away unused ports. This happens when LLD can't
6015 * determine the exact number of ports to allocate at
6018 for (i = host->n_ports; host->ports[i]; i++)
6019 kfree(host->ports[i]);
6021 /* give ports names and add SCSI hosts */
6022 for (i = 0; i < host->n_ports; i++)
6023 host->ports[i]->print_id = ata_print_id++;
6025 rc = ata_scsi_add_hosts(host, sht);
6029 /* associate with ACPI nodes */
6030 ata_acpi_associate(host);
6032 /* set cable, sata_spd_limit and report */
6033 for (i = 0; i < host->n_ports; i++) {
6034 struct ata_port *ap = host->ports[i];
6035 unsigned long xfer_mask;
6037 /* set SATA cable type if still unset */
6038 if (ap->cbl == ATA_CBL_NONE && (ap->flags & ATA_FLAG_SATA))
6039 ap->cbl = ATA_CBL_SATA;
6041 /* init sata_spd_limit to the current value */
6042 sata_link_init_spd(&ap->link);
6044 sata_link_init_spd(ap->slave_link);
6046 /* print per-port info to dmesg */
6047 xfer_mask = ata_pack_xfermask(ap->pio_mask, ap->mwdma_mask,
6050 if (!ata_port_is_dummy(ap)) {
6051 ata_port_printk(ap, KERN_INFO,
6052 "%cATA max %s %s\n",
6053 (ap->flags & ATA_FLAG_SATA) ? 'S' : 'P',
6054 ata_mode_string(xfer_mask),
6055 ap->link.eh_info.desc);
6056 ata_ehi_clear_desc(&ap->link.eh_info);
6058 ata_port_printk(ap, KERN_INFO, "DUMMY\n");
6061 /* perform each probe synchronously */
6062 DPRINTK("probe begin\n");
6063 for (i = 0; i < host->n_ports; i++) {
6064 struct ata_port *ap = host->ports[i];
6065 async_schedule(async_port_probe, ap);
6067 DPRINTK("probe end\n");
6073 * ata_host_activate - start host, request IRQ and register it
6074 * @host: target ATA host
6075 * @irq: IRQ to request
6076 * @irq_handler: irq_handler used when requesting IRQ
6077 * @irq_flags: irq_flags used when requesting IRQ
6078 * @sht: scsi_host_template to use when registering the host
6080 * After allocating an ATA host and initializing it, most libata
6081 * LLDs perform three steps to activate the host - start host,
6082 * request IRQ and register it. This helper takes necessasry
6083 * arguments and performs the three steps in one go.
6085 * An invalid IRQ skips the IRQ registration and expects the host to
6086 * have set polling mode on the port. In this case, @irq_handler
6090 * Inherited from calling layer (may sleep).
6093 * 0 on success, -errno otherwise.
6095 int ata_host_activate(struct ata_host *host, int irq,
6096 irq_handler_t irq_handler, unsigned long irq_flags,
6097 struct scsi_host_template *sht)
6101 rc = ata_host_start(host);
6105 /* Special case for polling mode */
6107 WARN_ON(irq_handler);
6108 return ata_host_register(host, sht);
6111 rc = devm_request_irq(host->dev, irq, irq_handler, irq_flags,
6112 dev_driver_string(host->dev), host);
6116 for (i = 0; i < host->n_ports; i++)
6117 ata_port_desc(host->ports[i], "irq %d", irq);
6119 rc = ata_host_register(host, sht);
6120 /* if failed, just free the IRQ and leave ports alone */
6122 devm_free_irq(host->dev, irq, host);
6128 * ata_port_detach - Detach ATA port in prepration of device removal
6129 * @ap: ATA port to be detached
6131 * Detach all ATA devices and the associated SCSI devices of @ap;
6132 * then, remove the associated SCSI host. @ap is guaranteed to
6133 * be quiescent on return from this function.
6136 * Kernel thread context (may sleep).
6138 static void ata_port_detach(struct ata_port *ap)
6140 unsigned long flags;
6142 if (!ap->ops->error_handler)
6145 /* tell EH we're leaving & flush EH */
6146 spin_lock_irqsave(ap->lock, flags);
6147 ap->pflags |= ATA_PFLAG_UNLOADING;
6148 ata_port_schedule_eh(ap);
6149 spin_unlock_irqrestore(ap->lock, flags);
6151 /* wait till EH commits suicide */
6152 ata_port_wait_eh(ap);
6154 /* it better be dead now */
6155 WARN_ON(!(ap->pflags & ATA_PFLAG_UNLOADED));
6157 cancel_rearming_delayed_work(&ap->hotplug_task);
6160 /* remove the associated SCSI host */
6161 scsi_remove_host(ap->scsi_host);
6165 * ata_host_detach - Detach all ports of an ATA host
6166 * @host: Host to detach
6168 * Detach all ports of @host.
6171 * Kernel thread context (may sleep).
6173 void ata_host_detach(struct ata_host *host)
6177 for (i = 0; i < host->n_ports; i++)
6178 ata_port_detach(host->ports[i]);
6180 /* the host is dead now, dissociate ACPI */
6181 ata_acpi_dissociate(host);
6187 * ata_pci_remove_one - PCI layer callback for device removal
6188 * @pdev: PCI device that was removed
6190 * PCI layer indicates to libata via this hook that hot-unplug or
6191 * module unload event has occurred. Detach all ports. Resource
6192 * release is handled via devres.
6195 * Inherited from PCI layer (may sleep).
6197 void ata_pci_remove_one(struct pci_dev *pdev)
6199 struct device *dev = &pdev->dev;
6200 struct ata_host *host = dev_get_drvdata(dev);
6202 ata_host_detach(host);
6205 /* move to PCI subsystem */
6206 int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits)
6208 unsigned long tmp = 0;
6210 switch (bits->width) {
6213 pci_read_config_byte(pdev, bits->reg, &tmp8);
6219 pci_read_config_word(pdev, bits->reg, &tmp16);
6225 pci_read_config_dword(pdev, bits->reg, &tmp32);
6236 return (tmp == bits->val) ? 1 : 0;
6240 void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg)
6242 pci_save_state(pdev);
6243 pci_disable_device(pdev);
6245 if (mesg.event & PM_EVENT_SLEEP)
6246 pci_set_power_state(pdev, PCI_D3hot);
6249 int ata_pci_device_do_resume(struct pci_dev *pdev)
6253 pci_set_power_state(pdev, PCI_D0);
6254 pci_restore_state(pdev);
6256 rc = pcim_enable_device(pdev);
6258 dev_printk(KERN_ERR, &pdev->dev,
6259 "failed to enable device after resume (%d)\n", rc);
6263 pci_set_master(pdev);
6267 int ata_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
6269 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6272 rc = ata_host_suspend(host, mesg);
6276 ata_pci_device_do_suspend(pdev, mesg);
6281 int ata_pci_device_resume(struct pci_dev *pdev)
6283 struct ata_host *host = dev_get_drvdata(&pdev->dev);
6286 rc = ata_pci_device_do_resume(pdev);
6288 ata_host_resume(host);
6291 #endif /* CONFIG_PM */
6293 #endif /* CONFIG_PCI */
6295 static int __init ata_parse_force_one(char **cur,
6296 struct ata_force_ent *force_ent,
6297 const char **reason)
6299 /* FIXME: Currently, there's no way to tag init const data and
6300 * using __initdata causes build failure on some versions of
6301 * gcc. Once __initdataconst is implemented, add const to the
6302 * following structure.
6304 static struct ata_force_param force_tbl[] __initdata = {
6305 { "40c", .cbl = ATA_CBL_PATA40 },
6306 { "80c", .cbl = ATA_CBL_PATA80 },
6307 { "short40c", .cbl = ATA_CBL_PATA40_SHORT },
6308 { "unk", .cbl = ATA_CBL_PATA_UNK },
6309 { "ign", .cbl = ATA_CBL_PATA_IGN },
6310 { "sata", .cbl = ATA_CBL_SATA },
6311 { "1.5Gbps", .spd_limit = 1 },
6312 { "3.0Gbps", .spd_limit = 2 },
6313 { "noncq", .horkage_on = ATA_HORKAGE_NONCQ },
6314 { "ncq", .horkage_off = ATA_HORKAGE_NONCQ },
6315 { "pio0", .xfer_mask = 1 << (ATA_SHIFT_PIO + 0) },
6316 { "pio1", .xfer_mask = 1 << (ATA_SHIFT_PIO + 1) },
6317 { "pio2", .xfer_mask = 1 << (ATA_SHIFT_PIO + 2) },
6318 { "pio3", .xfer_mask = 1 << (ATA_SHIFT_PIO + 3) },
6319 { "pio4", .xfer_mask = 1 << (ATA_SHIFT_PIO + 4) },
6320 { "pio5", .xfer_mask = 1 << (ATA_SHIFT_PIO + 5) },
6321 { "pio6", .xfer_mask = 1 << (ATA_SHIFT_PIO + 6) },
6322 { "mwdma0", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 0) },
6323 { "mwdma1", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 1) },
6324 { "mwdma2", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 2) },
6325 { "mwdma3", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 3) },
6326 { "mwdma4", .xfer_mask = 1 << (ATA_SHIFT_MWDMA + 4) },
6327 { "udma0", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6328 { "udma16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6329 { "udma/16", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 0) },
6330 { "udma1", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6331 { "udma25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6332 { "udma/25", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 1) },
6333 { "udma2", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6334 { "udma33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6335 { "udma/33", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 2) },
6336 { "udma3", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6337 { "udma44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6338 { "udma/44", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 3) },
6339 { "udma4", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6340 { "udma66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6341 { "udma/66", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 4) },
6342 { "udma5", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6343 { "udma100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6344 { "udma/100", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 5) },
6345 { "udma6", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6346 { "udma133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6347 { "udma/133", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 6) },
6348 { "udma7", .xfer_mask = 1 << (ATA_SHIFT_UDMA + 7) },
6349 { "nohrst", .lflags = ATA_LFLAG_NO_HRST },
6350 { "nosrst", .lflags = ATA_LFLAG_NO_SRST },
6351 { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST },
6353 char *start = *cur, *p = *cur;
6354 char *id, *val, *endp;
6355 const struct ata_force_param *match_fp = NULL;
6356 int nr_matches = 0, i;
6358 /* find where this param ends and update *cur */
6359 while (*p != '\0' && *p != ',')
6370 p = strchr(start, ':');
6372 val = strstrip(start);
6377 id = strstrip(start);
6378 val = strstrip(p + 1);
6381 p = strchr(id, '.');
6384 force_ent->device = simple_strtoul(p, &endp, 10);
6385 if (p == endp || *endp != '\0') {
6386 *reason = "invalid device";
6391 force_ent->port = simple_strtoul(id, &endp, 10);
6392 if (p == endp || *endp != '\0') {
6393 *reason = "invalid port/link";
6398 /* parse val, allow shortcuts so that both 1.5 and 1.5Gbps work */
6399 for (i = 0; i < ARRAY_SIZE(force_tbl); i++) {
6400 const struct ata_force_param *fp = &force_tbl[i];
6402 if (strncasecmp(val, fp->name, strlen(val)))
6408 if (strcasecmp(val, fp->name) == 0) {
6415 *reason = "unknown value";
6418 if (nr_matches > 1) {
6419 *reason = "ambigious value";
6423 force_ent->param = *match_fp;
6428 static void __init ata_parse_force_param(void)
6430 int idx = 0, size = 1;
6431 int last_port = -1, last_device = -1;
6432 char *p, *cur, *next;
6434 /* calculate maximum number of params and allocate force_tbl */
6435 for (p = ata_force_param_buf; *p; p++)
6439 ata_force_tbl = kzalloc(sizeof(ata_force_tbl[0]) * size, GFP_KERNEL);
6440 if (!ata_force_tbl) {
6441 printk(KERN_WARNING "ata: failed to extend force table, "
6442 "libata.force ignored\n");
6446 /* parse and populate the table */
6447 for (cur = ata_force_param_buf; *cur != '\0'; cur = next) {
6448 const char *reason = "";
6449 struct ata_force_ent te = { .port = -1, .device = -1 };
6452 if (ata_parse_force_one(&next, &te, &reason)) {
6453 printk(KERN_WARNING "ata: failed to parse force "
6454 "parameter \"%s\" (%s)\n",
6459 if (te.port == -1) {
6460 te.port = last_port;
6461 te.device = last_device;
6464 ata_force_tbl[idx++] = te;
6466 last_port = te.port;
6467 last_device = te.device;
6470 ata_force_tbl_size = idx;
6473 static int __init ata_init(void)
6475 ata_parse_force_param();
6477 ata_wq = create_workqueue("ata");
6479 goto free_force_tbl;
6481 ata_aux_wq = create_singlethread_workqueue("ata_aux");
6485 printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
6489 destroy_workqueue(ata_wq);
6491 kfree(ata_force_tbl);
6495 static void __exit ata_exit(void)
6497 kfree(ata_force_tbl);
6498 destroy_workqueue(ata_wq);
6499 destroy_workqueue(ata_aux_wq);
6502 subsys_initcall(ata_init);
6503 module_exit(ata_exit);
6505 static unsigned long ratelimit_time;
6506 static DEFINE_SPINLOCK(ata_ratelimit_lock);
6508 int ata_ratelimit(void)
6511 unsigned long flags;
6513 spin_lock_irqsave(&ata_ratelimit_lock, flags);
6515 if (time_after(jiffies, ratelimit_time)) {
6517 ratelimit_time = jiffies + (HZ/5);
6521 spin_unlock_irqrestore(&ata_ratelimit_lock, flags);
6527 * ata_wait_register - wait until register value changes
6528 * @reg: IO-mapped register
6529 * @mask: Mask to apply to read register value
6530 * @val: Wait condition
6531 * @interval: polling interval in milliseconds
6532 * @timeout: timeout in milliseconds
6534 * Waiting for some bits of register to change is a common
6535 * operation for ATA controllers. This function reads 32bit LE
6536 * IO-mapped register @reg and tests for the following condition.
6538 * (*@reg & mask) != val
6540 * If the condition is met, it returns; otherwise, the process is
6541 * repeated after @interval_msec until timeout.
6544 * Kernel thread context (may sleep)
6547 * The final register value.
6549 u32 ata_wait_register(void __iomem *reg, u32 mask, u32 val,
6550 unsigned long interval, unsigned long timeout)
6552 unsigned long deadline;
6555 tmp = ioread32(reg);
6557 /* Calculate timeout _after_ the first read to make sure
6558 * preceding writes reach the controller before starting to
6559 * eat away the timeout.
6561 deadline = ata_deadline(jiffies, timeout);
6563 while ((tmp & mask) == val && time_before(jiffies, deadline)) {
6565 tmp = ioread32(reg);
6574 static unsigned int ata_dummy_qc_issue(struct ata_queued_cmd *qc)
6576 return AC_ERR_SYSTEM;
6579 static void ata_dummy_error_handler(struct ata_port *ap)
6584 struct ata_port_operations ata_dummy_port_ops = {
6585 .qc_prep = ata_noop_qc_prep,
6586 .qc_issue = ata_dummy_qc_issue,
6587 .error_handler = ata_dummy_error_handler,
6590 const struct ata_port_info ata_dummy_port_info = {
6591 .port_ops = &ata_dummy_port_ops,
6595 * libata is essentially a library of internal helper functions for
6596 * low-level ATA host controller drivers. As such, the API/ABI is
6597 * likely to change as new drivers are added and updated.
6598 * Do not depend on ABI/API stability.
6600 EXPORT_SYMBOL_GPL(sata_deb_timing_normal);
6601 EXPORT_SYMBOL_GPL(sata_deb_timing_hotplug);
6602 EXPORT_SYMBOL_GPL(sata_deb_timing_long);
6603 EXPORT_SYMBOL_GPL(ata_base_port_ops);
6604 EXPORT_SYMBOL_GPL(sata_port_ops);
6605 EXPORT_SYMBOL_GPL(ata_dummy_port_ops);
6606 EXPORT_SYMBOL_GPL(ata_dummy_port_info);
6607 EXPORT_SYMBOL_GPL(ata_link_next);
6608 EXPORT_SYMBOL_GPL(ata_dev_next);
6609 EXPORT_SYMBOL_GPL(ata_std_bios_param);
6610 EXPORT_SYMBOL_GPL(ata_host_init);
6611 EXPORT_SYMBOL_GPL(ata_host_alloc);
6612 EXPORT_SYMBOL_GPL(ata_host_alloc_pinfo);
6613 EXPORT_SYMBOL_GPL(ata_slave_link_init);
6614 EXPORT_SYMBOL_GPL(ata_host_start);
6615 EXPORT_SYMBOL_GPL(ata_host_register);
6616 EXPORT_SYMBOL_GPL(ata_host_activate);
6617 EXPORT_SYMBOL_GPL(ata_host_detach);
6618 EXPORT_SYMBOL_GPL(ata_sg_init);
6619 EXPORT_SYMBOL_GPL(ata_qc_complete);
6620 EXPORT_SYMBOL_GPL(ata_qc_complete_multiple);
6621 EXPORT_SYMBOL_GPL(atapi_cmd_type);
6622 EXPORT_SYMBOL_GPL(ata_tf_to_fis);
6623 EXPORT_SYMBOL_GPL(ata_tf_from_fis);
6624 EXPORT_SYMBOL_GPL(ata_pack_xfermask);
6625 EXPORT_SYMBOL_GPL(ata_unpack_xfermask);
6626 EXPORT_SYMBOL_GPL(ata_xfer_mask2mode);
6627 EXPORT_SYMBOL_GPL(ata_xfer_mode2mask);
6628 EXPORT_SYMBOL_GPL(ata_xfer_mode2shift);
6629 EXPORT_SYMBOL_GPL(ata_mode_string);
6630 EXPORT_SYMBOL_GPL(ata_id_xfermask);
6631 EXPORT_SYMBOL_GPL(ata_port_start);
6632 EXPORT_SYMBOL_GPL(ata_do_set_mode);
6633 EXPORT_SYMBOL_GPL(ata_std_qc_defer);
6634 EXPORT_SYMBOL_GPL(ata_noop_qc_prep);
6635 EXPORT_SYMBOL_GPL(ata_port_probe);
6636 EXPORT_SYMBOL_GPL(ata_dev_disable);
6637 EXPORT_SYMBOL_GPL(sata_set_spd);
6638 EXPORT_SYMBOL_GPL(ata_wait_after_reset);
6639 EXPORT_SYMBOL_GPL(sata_link_debounce);
6640 EXPORT_SYMBOL_GPL(sata_link_resume);
6641 EXPORT_SYMBOL_GPL(ata_std_prereset);
6642 EXPORT_SYMBOL_GPL(sata_link_hardreset);
6643 EXPORT_SYMBOL_GPL(sata_std_hardreset);
6644 EXPORT_SYMBOL_GPL(ata_std_postreset);
6645 EXPORT_SYMBOL_GPL(ata_dev_classify);
6646 EXPORT_SYMBOL_GPL(ata_dev_pair);
6647 EXPORT_SYMBOL_GPL(ata_port_disable);
6648 EXPORT_SYMBOL_GPL(ata_ratelimit);
6649 EXPORT_SYMBOL_GPL(ata_wait_register);
6650 EXPORT_SYMBOL_GPL(ata_scsi_queuecmd);
6651 EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
6652 EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);
6653 EXPORT_SYMBOL_GPL(ata_scsi_change_queue_depth);
6654 EXPORT_SYMBOL_GPL(sata_scr_valid);
6655 EXPORT_SYMBOL_GPL(sata_scr_read);
6656 EXPORT_SYMBOL_GPL(sata_scr_write);
6657 EXPORT_SYMBOL_GPL(sata_scr_write_flush);
6658 EXPORT_SYMBOL_GPL(ata_link_online);
6659 EXPORT_SYMBOL_GPL(ata_link_offline);
6661 EXPORT_SYMBOL_GPL(ata_host_suspend);
6662 EXPORT_SYMBOL_GPL(ata_host_resume);
6663 #endif /* CONFIG_PM */
6664 EXPORT_SYMBOL_GPL(ata_id_string);
6665 EXPORT_SYMBOL_GPL(ata_id_c_string);
6666 EXPORT_SYMBOL_GPL(ata_do_dev_read_id);
6667 EXPORT_SYMBOL_GPL(ata_scsi_simulate);
6669 EXPORT_SYMBOL_GPL(ata_pio_need_iordy);
6670 EXPORT_SYMBOL_GPL(ata_timing_find_mode);
6671 EXPORT_SYMBOL_GPL(ata_timing_compute);
6672 EXPORT_SYMBOL_GPL(ata_timing_merge);
6673 EXPORT_SYMBOL_GPL(ata_timing_cycle2mode);
6676 EXPORT_SYMBOL_GPL(pci_test_config_bits);
6677 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
6679 EXPORT_SYMBOL_GPL(ata_pci_device_do_suspend);
6680 EXPORT_SYMBOL_GPL(ata_pci_device_do_resume);
6681 EXPORT_SYMBOL_GPL(ata_pci_device_suspend);
6682 EXPORT_SYMBOL_GPL(ata_pci_device_resume);
6683 #endif /* CONFIG_PM */
6684 #endif /* CONFIG_PCI */
6686 EXPORT_SYMBOL_GPL(__ata_ehi_push_desc);
6687 EXPORT_SYMBOL_GPL(ata_ehi_push_desc);
6688 EXPORT_SYMBOL_GPL(ata_ehi_clear_desc);
6689 EXPORT_SYMBOL_GPL(ata_port_desc);
6691 EXPORT_SYMBOL_GPL(ata_port_pbar_desc);
6692 #endif /* CONFIG_PCI */
6693 EXPORT_SYMBOL_GPL(ata_port_schedule_eh);
6694 EXPORT_SYMBOL_GPL(ata_link_abort);
6695 EXPORT_SYMBOL_GPL(ata_port_abort);
6696 EXPORT_SYMBOL_GPL(ata_port_freeze);
6697 EXPORT_SYMBOL_GPL(sata_async_notification);
6698 EXPORT_SYMBOL_GPL(ata_eh_freeze_port);
6699 EXPORT_SYMBOL_GPL(ata_eh_thaw_port);
6700 EXPORT_SYMBOL_GPL(ata_eh_qc_complete);
6701 EXPORT_SYMBOL_GPL(ata_eh_qc_retry);
6702 EXPORT_SYMBOL_GPL(ata_eh_analyze_ncq_error);
6703 EXPORT_SYMBOL_GPL(ata_do_eh);
6704 EXPORT_SYMBOL_GPL(ata_std_error_handler);
6706 EXPORT_SYMBOL_GPL(ata_cable_40wire);
6707 EXPORT_SYMBOL_GPL(ata_cable_80wire);
6708 EXPORT_SYMBOL_GPL(ata_cable_unknown);
6709 EXPORT_SYMBOL_GPL(ata_cable_ignore);
6710 EXPORT_SYMBOL_GPL(ata_cable_sata);